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Consolidated Schedule of Investments (Unaudited) - Investments (Details) - USD ($)	Jun. 30, 2025	Mar. 31, 2025	Dec. 31, 2024	Jun. 30, 2024	Mar. 31, 2024	Dec. 31, 2023
Investments at cost	$ 745,848,000		$ 766,774,000
Investments at fair value	622,653,000		697,891,000
Unrestricted Short Term Investments [Member]
Investments at cost	53,261,000		27,266,000
Investments at fair value	53,261,000		27,266,000
Restricted Short Term Investments [Member]
Investments at cost	3,226,000		3,338,000
Investments at fair value	3,226,000		3,338,000
Equity Securities [Member]
Investments at cost	38,098,000		35,942,000
Investments at fair value	13,402,000		26,198,000
Warrant [Member]
Investments at cost	15,565,000		15,956,000
Investments at fair value	21,629,000		18,277,000
U S Bank Money Market Deposit Account [Member] | Unrestricted Short Term Investments [Member]
Investments at cost	53,261,000		27,266,000
Investments at fair value	53,261,000		27,266,000
U S Bank Money Market Deposit Account [Member] | Restricted Short Term Investments [Member]
Investments at cost	3,226,000		3,338,000
Investments at fair value	3,226,000		3,338,000
Other Sustainability Sector [Member]
Investments at cost	30,449,000		66,151,000
Investments at fair value	23,008,000		66,079,000
Software Sector [Member]
Investments at cost	165,371,000		154,040,000
Investments at fair value	158,536,000		151,043,000
Biotechnology Sector [Member]
Investments at cost	120,283,000		118,221,000
Investments at fair value	84,043,000		97,562,000
Medical Device Sector [Member]
Investments at cost	239,170,000		213,564,000
Investments at fair value	209,087,000		205,634,000
Energy Efficiency [Member]
Investments at cost	9,934,000		9,818,000
Investments at fair value	9,828,000		9,712,000
Other Healthcare Sector [Member]
Investments at cost	39,575,000		39,533,000
Investments at fair value	42,194,000		40,144,000
Networking Sector [Member]
Investments at cost	364,000		10,070,000
Investments at fair value	121,000		9,827,000
Diagnostics Sector [Member]
Investments at cost	17,350,000		16,704,000
Investments at fair value	9,940,000		13,701,000
Communications Sector [Member]
Investments at cost	517,000		11,711,000
Investments at fair value	3,532,000		14,763,000
Investment, Affiliated Issuer, Controlled [Member]
Investments at cost	49,202,000		44,780,000
Investments at fair value	10,455,000	$ 14,869,000	31,819,000	$ 11,386,000	$ 13,644,000	$ 14,223,000
Investment, Affiliated Issuer, Controlled [Member] | Debt Securities [Member]
Investments at cost	801,000		17,611,000
Investments at fair value	801,000		7,668,000
Investment, Affiliated Issuer, Controlled [Member] | Equity Securities [Member]
Investments at cost	23,289,000		21,289,000
Investments at fair value	7,910,000		17,921,000
Investment, Affiliated Issuer, Controlled [Member] | Other Investments [Member]
Investments at cost	25,112,000		5,880,000
Investments at fair value	1,744,000		6,230,000
Investment, Affiliated Issuer, Controlled [Member] | Nexii Building Solutions, Inc [Member]
Investments at fair value	8,711,000	8,700,000	8,547,000
Investment, Affiliated Issuer, Controlled [Member] | Better Place Forests Co. [Member]
Investments at fair value	879,000	879,000	0	5,550,000	7,799,000	7,993,000
Investment, Affiliated Issuer, Controlled [Member] | Swift Health Systems Inc. [Member]
Investments at fair value	0	0	17,042,000
Investment, Affiliated Issuer, Controlled [Member] | HIMV LLC [Member]
Investments at fair value	865,000	5,290,000	6,230,000	5,836,000	5,845,000	6,230,000
Investment, Affiliated Issuer, Controlled [Member] | Other Sustainability Sector [Member] | Nexii Building Solutions, Inc [Member] | Term Loan, Fixed Index One [Member]
Principal Amount			790,000
Investment, Affiliated Issuer, Controlled [Member] | Other Sustainability Sector [Member] | Nexii Building Solutions, Inc [Member] | Debt Securities [Member]
Principal Amount	790,000
Investment, Affiliated Issuer, Controlled [Member] | Other Sustainability Sector [Member] | Nexii Building Solutions, Inc [Member] | Common Stock [Member]
Investments at cost	3,297,000		3,297,000
Investments at fair value	$ 0		$ 0
Number of Shares (in shares)	108,320		108,320
Investment, Affiliated Issuer, Controlled [Member] | Other Sustainability Sector [Member] | Nexii Building Solutions, Inc [Member] | Preferred Stock [Member]
Investments at cost	$ 3,419,000		$ 3,419,000
Investments at fair value	$ 7,910,000		$ 7,909,000
Number of Shares (in shares)	542		542
Investment, Affiliated Issuer, Controlled [Member] | Consumer-related Technologies [Member] | Better Place Forests Co. [Member] | Term Loan, Prime Index, One [Member]
Principal Amount			$ 4,012,000
Investment, Affiliated Issuer, Controlled [Member] | Consumer-related Technologies [Member] | Better Place Forests Co. [Member] | Term Loan, Prime Index, Two [Member]
Principal Amount			2,006,000
Investment, Affiliated Issuer, Controlled [Member] | Consumer-related Technologies [Member] | Better Place Forests Co. [Member] | Term Loan, Prime Index, Three [Member]
Principal Amount			538,000
Investment, Affiliated Issuer, Controlled [Member] | Consumer-related Technologies [Member] | Better Place Forests Co. [Member] | Term Loan, Prime Index, Four [Member]
Principal Amount			532,000
Investment, Affiliated Issuer, Controlled [Member] | Consumer-related Technologies [Member] | Better Place Forests Co. [Member] | Term Loan, Prime Index, Five [Member]
Principal Amount			521,000
Investment, Affiliated Issuer, Controlled [Member] | Consumer-related Technologies [Member] | Better Place Forests Co. [Member] | Term Loan, Prime Index, Six [Member]
Principal Amount			513,000
Investment, Affiliated Issuer, Controlled [Member] | Consumer-related Technologies [Member] | Better Place Forests Co. [Member] | Term Loan, Prime Index, Seven [Member]
Principal Amount			505,000
Investment, Affiliated Issuer, Controlled [Member] | Consumer-related Technologies [Member] | Better Place Forests Co. [Member] | Common Stock [Member]
Investments at cost	$ 639,000		639,000
Investments at fair value	$ 0		$ 0
Number of Shares (in shares)	2,278,272		2,278,272
Investment, Affiliated Issuer, Controlled [Member] | Consumer-related Technologies [Member] | Better Place Forests Co. [Member] | Preferred Stock [Member]
Investments at cost	$ 3,922,000		$ 3,922,000
Investments at fair value	$ 0		$ 0
Number of Shares (in shares)	5,350,142		5,350,142
Investment, Affiliated Issuer, Controlled [Member] | Consumer-related Technologies [Member] | Better Place Forests Co. [Member] | Other Investments [Member]
Investments at cost	$ 10,703,000
Investments at fair value	879,000
Investment, Affiliated Issuer, Controlled [Member] | Biotechnology Sector [Member] | HIMV LLC [Member] | Other Investments [Member]
Investments at cost	5,880,000		$ 5,880,000
Investments at fair value	865,000		6,230,000
Investment, Affiliated Issuer, Controlled [Member] | Medical Device Sector [Member] | Swift Health Systems Inc. [Member] | Term Loan, Prime Index, One [Member]
Principal Amount			1,948,000
Investment, Affiliated Issuer, Controlled [Member] | Medical Device Sector [Member] | Swift Health Systems Inc. [Member] | Term Loan, Prime Index, Two [Member]
Principal Amount			1,948,000
Investment, Affiliated Issuer, Controlled [Member] | Medical Device Sector [Member] | Swift Health Systems Inc. [Member] | Term Loan, Prime Index, Three [Member]
Principal Amount			1,948,000
Investment, Affiliated Issuer, Controlled [Member] | Medical Device Sector [Member] | Swift Health Systems Inc. [Member] | Term Loan, Prime Index, Four [Member]
Principal Amount			1,948,000
Investment, Affiliated Issuer, Controlled [Member] | Medical Device Sector [Member] | Swift Health Systems Inc. [Member] | Term Loan, Prime Index, Five [Member]
Principal Amount			315,000
Investment, Affiliated Issuer, Controlled [Member] | Medical Device Sector [Member] | Swift Health Systems Inc. [Member] | Term Loan, Prime Index, Six [Member]
Principal Amount			156,000
Investment, Affiliated Issuer, Controlled [Member] | Medical Device Sector [Member] | Swift Health Systems Inc. [Member] | Preferred Stock [Member]
Investments at cost	12,012,000		10,012
Investments at fair value	$ 0		$ 10,012
Number of Shares (in shares)	4,233,666		3,588,505
Investment, Affiliated Issuer, Controlled [Member] | Medical Device Sector [Member] | Swift Health Systems Inc. [Member] | Other Investments [Member]
Investments at cost	$ 8,529,000
Investments at fair value	0
Investment, Unaffiliated Issuer [Member]
Investments at cost	669,153,000		$ 694,503,000
Investments at fair value	605,491,000		657,765,000
Investment, Unaffiliated Issuer [Member] | Debt Securities [Member]
Investments at cost	635,460,000		660,556,000
Investments at fair value	578,370,000		631,111,000
Investment, Unaffiliated Issuer [Member] | Equity Securities [Member]
Investments at cost	9,809,000		9,653,000
Investments at fair value	5,492,000		8,277,000
Investment, Unaffiliated Issuer [Member] | Warrant [Member]
Investments at cost	15,438,000		15,829,000
Investments at fair value	21,629,000		18,277,000
Investment, Unaffiliated Issuer [Member] | Other Investments [Member]
Investments at cost	8,446,000		8,465,000
Investments at fair value	0		100,000
Investment, Unaffiliated Issuer [Member] | Castle Creek Biosciences, Inc [Member] | Common Stock [Member]
Investments at cost	250,000		250,000
Investments at fair value	$ 250,000		$ 250,000
Number of Shares (in shares)	1,162		1,162
Investment, Unaffiliated Issuer [Member] | Emalex Biosciences, Inc. [Member] | Common Stock [Member]
Investments at cost	$ 545,000		$ 356,000
Investments at fair value	$ 655,000		$ 356,000
Number of Shares (in shares)	47,461		32,831
Investment, Unaffiliated Issuer [Member] | NextCar Holding Company, Inc [Member] | Preferred Stock [Member]
Investments at cost	$ 89,000		$ 89,000
Investments at fair value	$ 0		$ 0
Number of Shares (in shares)	2,688,971		2,688,971
Investment, Unaffiliated Issuer [Member] | Axiom Space, Inc [Member] | Preferred Stock [Member]
Investments at cost	$ 261,000		$ 261,000
Investments at fair value	$ 306,000		$ 306,000
Number of Shares (in shares)	1,810		1,810
Investment, Unaffiliated Issuer [Member] | Cognoa, Inc. [Member] | Common Stock [Member]
Investments at cost	$ 487,000		$ 487,000
Investments at fair value	$ 487,000		$ 487,000
Number of Shares (in shares)	8,123,877		8,123,877
Investment, Unaffiliated Issuer [Member] | Cognoa, Inc. [Member] | Preferred Stock [Member]
Investments at cost	$ 250,000		$ 250,000
Investments at fair value	$ 250,000		$ 250,000
Number of Shares (in shares)	1,059,636		1,059,636
Investment, Unaffiliated Issuer [Member] | Lumithera, Inc. [Member] | Common Stock [Member]
Investments at cost	$ 2,000,000		$ 2,000,000
Investments at fair value	$ 1,700,000		$ 1,700,000
Number of Shares (in shares)	392,651		392,651
Investment, Unaffiliated Issuer [Member] | Cadrenal Therapeutics, Inc. [Member] | Common Stock [Member]
Investments at cost	$ 0		$ 0
Investments at fair value	$ 482,000		$ 580,000
Number of Shares (in shares)	40,000		40,000
Investment, Unaffiliated Issuer [Member] | PebblePost, Inc [Member] | Preferred Stock [Member]
Investments at cost	$ 73,000		$ 73,000
Investments at fair value	$ 73,000		$ 73,000
Number of Shares (in shares)	56,212		56,212
Investment, Unaffiliated Issuer [Member] | Caastle, Inc [Member] | Preferred Stock [Member]
Investments at cost	$ 2,681,000		$ 2,681,000
Investments at fair value	$ 0		$ 2,681,000
Number of Shares (in shares)	242,180		242,180
Investment, Unaffiliated Issuer [Member] | Getaround, Inc [Member] | Common Stock [Member]
Investments at cost	$ 253,000		$ 253,000
Investments at fair value	$ 1,000		$ 3,000
Number of Shares (in shares)	87,082		87,082
Investment, Unaffiliated Issuer [Member] | SnagAJob.com, Inc [Member] | Common Stock [Member]
Investments at cost	$ 9,000		$ 9,000
Investments at fair value	$ 0		$ 83,000
Number of Shares (in shares)	82,974		82,974
Investment, Unaffiliated Issuer [Member] | Tigo Energy, Inc. [Member] | Common Stock [Member]
Investments at cost	$ 111,000		$ 111,000
Investments at fair value	$ 7,000		$ 5,000
Number of Shares (in shares)	5,205		5,205
Investment, Unaffiliated Issuer [Member] | Decisyon, Inc [Member] | Preferred Stock [Member]
Investments at cost	$ 2,800,000		$ 2,800,000
Investments at fair value	$ 1,281,000		$ 1,281,000
Number of Shares (in shares)	280,000		280,000
Investment, Unaffiliated Issuer [Member] | Lotame Solutions, Inc. [Member] | Preferred Stock [Member]
Investments at cost			$ 4,000
Investments at fair value			$ 193,000
Number of Shares (in shares)			66,127
Investment, Unaffiliated Issuer [Member] | Lotame Solutions, Inc. [Member] | Preferred Stock 2 [Member]
Investments at cost			$ 29,000
Investments at fair value			$ 29,000
Number of Shares (in shares)			9,381
Investment, Unaffiliated Issuer [Member] | Other Sustainability Sector [Member] | New Aerofarms, Inc. assignee of Aerofarms, Inc [Member] | Term Loan, Prime Index, One [Member]
Principal Amount			$ 3,594,000
Investment, Unaffiliated Issuer [Member] | Other Sustainability Sector [Member] | New Aerofarms, Inc. assignee of Aerofarms, Inc [Member] | Term Loan, Prime Index, Two [Member]
Principal Amount			3,594,000
Investment, Unaffiliated Issuer [Member] | Other Sustainability Sector [Member] | Soli Organic, Inc [Member] | Term Loan, Prime Index, One [Member]
Principal Amount	$ 5,000,000		5,000,000
Investment, Unaffiliated Issuer [Member] | Other Sustainability Sector [Member] | Soli Organic, Inc [Member] | Term Loan, Prime Index, Two [Member]
Principal Amount	2,500,000		2,500,000
Investment, Unaffiliated Issuer [Member] | Other Sustainability Sector [Member] | Soli Organic, Inc [Member] | Term Loan, Prime Index, Three [Member]
Principal Amount	5,000,000		5,000,000
Investment, Unaffiliated Issuer [Member] | Other Sustainability Sector [Member] | Soli Organic, Inc [Member] | Term Loan, Prime Index, Four [Member]
Principal Amount	2,500,000		2,500,000
Investment, Unaffiliated Issuer [Member] | Other Sustainability Sector [Member] | Soli Organic, Inc [Member] | Term Loan, Prime Index, Five [Member]
Principal Amount	5,000,000		5,000,000
Investment, Unaffiliated Issuer [Member] | Other Sustainability Sector [Member] | Soli Organic, Inc [Member] | Term Loan, Prime Index, Six [Member]
Principal Amount	2,500,000		2,500,000
Investment, Unaffiliated Issuer [Member] | Other Sustainability Sector [Member] | Temperpack Technologies, Inc [Member] | Term Loan, Prime Index, One [Member]
Principal Amount			3,750,000
Investment, Unaffiliated Issuer [Member] | Other Sustainability Sector [Member] | Temperpack Technologies, Inc [Member] | Term Loan, Prime Index, Two [Member]
Principal Amount			3,750,000
Investment, Unaffiliated Issuer [Member] | Other Sustainability Sector [Member] | Temperpack Technologies, Inc [Member] | Term Loan, Prime Index, Three [Member]
Principal Amount			7,500,000
Investment, Unaffiliated Issuer [Member] | Other Sustainability Sector [Member] | Temperpack Technologies, Inc [Member] | Term Loan, Prime Index, Four [Member]
Principal Amount			3,750,000
Investment, Unaffiliated Issuer [Member] | Other Sustainability Sector [Member] | Temperpack Technologies, Inc [Member] | Term Loan, Prime Index, Five [Member]
Principal Amount			3,750,000
Investment, Unaffiliated Issuer [Member] | Other Sustainability Sector [Member] | Temperpack Technologies, Inc [Member] | Term Loan, Prime Index, Six [Member]
Principal Amount			4,500,000
Investment, Unaffiliated Issuer [Member] | Other Sustainability Sector [Member] | Temperpack Technologies, Inc [Member] | Term Loan, Prime Index, Seven [Member]
Principal Amount			2,000,000
Investment, Unaffiliated Issuer [Member] | Consumer-related Technologies [Member] | Havenly, Inc. [Member] | Term Loan, Prime Index, One [Member]
Principal Amount	1,556,000		2,000,000
Investment, Unaffiliated Issuer [Member] | Consumer-related Technologies [Member] | Havenly, Inc. [Member] | Term Loan, Prime Index, Two [Member]
Principal Amount	2,333,000		3,000,000
Investment, Unaffiliated Issuer [Member] | Consumer-related Technologies [Member] | Havenly, Inc. [Member] | Term Loan, Prime Index, Three [Member]
Principal Amount	2,813,000		2,813,000
Investment, Unaffiliated Issuer [Member] | Consumer-related Technologies [Member] | Havenly, Inc. [Member] | Term Loan, Prime Index, Four [Member]
Principal Amount	2,813,000		2,813,000
Investment, Unaffiliated Issuer [Member] | Consumer-related Technologies [Member] | Lyrical Foods, Inc [Member] | Term Loan, Prime Index, One [Member]
Principal Amount	2,679,000		2,679,000
Investment, Unaffiliated Issuer [Member] | Consumer-related Technologies [Member] | NextCar Holding Company, Inc [Member] | Term Loan, Prime Index, One [Member]
Principal Amount	6,313,000		6,042,000
Investment, Unaffiliated Issuer [Member] | Consumer-related Technologies [Member] | NextCar Holding Company, Inc [Member] | Term Loan, Prime Index, Two [Member]
Principal Amount	3,157,000		3,021,000
Investment, Unaffiliated Issuer [Member] | Consumer-related Technologies [Member] | NextCar Holding Company, Inc [Member] | Term Loan, Prime Index, Three [Member]
Principal Amount	2,525,000		2,417,000
Investment, Unaffiliated Issuer [Member] | Consumer-related Technologies [Member] | NextCar Holding Company, Inc [Member] | Term Loan, Prime Index, Four [Member]
Principal Amount	3,157,000		3,021,000
Investment, Unaffiliated Issuer [Member] | Consumer-related Technologies [Member] | NextCar Holding Company, Inc [Member] | Term Loan, Prime Index, Five [Member]
Principal Amount	3,788,000		3,625,000
Investment, Unaffiliated Issuer [Member] | Consumer-related Technologies [Member] | NextCar Holding Company, Inc [Member] | Term Loan, Prime Index, Six [Member]
Principal Amount	3,157,000		3,021,000
Investment, Unaffiliated Issuer [Member] | Consumer-related Technologies [Member] | NextCar Holding Company, Inc [Member] | Term Loan, Prime Index, Seven [Member]
Principal Amount	6,313,000		6,042,000
Investment, Unaffiliated Issuer [Member] | Consumer-related Technologies [Member] | NextCar Holding Company, Inc [Member] | Term Loan, Prime Index, Eight [Member]
Principal Amount	3,157,000		3,021,000
Investment, Unaffiliated Issuer [Member] | Consumer-related Technologies [Member] | Optoro, Inc. [Member] | Term Loan, Prime Index, One [Member]
Principal Amount	2,500,000		2,500,000
Investment, Unaffiliated Issuer [Member] | Consumer-related Technologies [Member] | Optoro, Inc. [Member] | Term Loan, Prime Index, Two [Member]
Principal Amount	1,875,000		1,875,000
Investment, Unaffiliated Issuer [Member] | Consumer-related Technologies [Member] | Standvast Holdings, LLC [Member] | Term Loan, Prime Index, One [Member]
Principal Amount			2,500,000
Investment, Unaffiliated Issuer [Member] | Consumer-related Technologies [Member] | Standvast Holdings, LLC [Member] | Term Loan, Prime Index, Two [Member]
Principal Amount			2,500,000
Investment, Unaffiliated Issuer [Member] | Consumer-related Technologies [Member] | Standvast Holdings, LLC [Member] | Term Loan, Prime Index, Three [Member]
Principal Amount			2,500,000
Investment, Unaffiliated Issuer [Member] | Consumer-related Technologies [Member] | Unagi, Inc [Member] | Term Loan, Prime Index, One [Member]
Principal Amount			1,415,000
Investment, Unaffiliated Issuer [Member] | Consumer-related Technologies [Member] | Unagi, Inc [Member] | Term Loan, Prime Index, Two [Member]
Principal Amount			708,000
Investment, Unaffiliated Issuer [Member] | Consumer-related Technologies [Member] | Unagi, Inc [Member] | Term Loan, Prime Index, Three [Member]
Principal Amount			708,000
Investment, Unaffiliated Issuer [Member] | Consumer-related Technologies [Member] | Crafty Holdings, Inc.[Member] | Term Loan, Prime Index, Two [Member]
Principal Amount	5,000,000
Investment, Unaffiliated Issuer [Member] | Consumer-related Technologies [Member] | Crafty Holdings, Inc.[Member] | Term Loan, Prime Index, Three [Member]
Principal Amount	5,000,000
Investment, Unaffiliated Issuer [Member] | Software Sector [Member] | Kodiak Robotics, Inc. [Member] | Term Loan, Prime Index, One [Member]
Principal Amount	8,333,000		10,000,000
Investment, Unaffiliated Issuer [Member] | Software Sector [Member] | Kodiak Robotics, Inc. [Member] | Term Loan, Prime Index, Two [Member]
Principal Amount	8,333,000		10,000,000
Investment, Unaffiliated Issuer [Member] | Software Sector [Member] | Kodiak Robotics, Inc. [Member] | Term Loan, Prime Index, Three [Member]
Principal Amount	4,167,000		5,000,000
Investment, Unaffiliated Issuer [Member] | Software Sector [Member] | Kodiak Robotics, Inc. [Member] | Term Loan, Prime Index, Four [Member]
Principal Amount	4,167,000		5,000,000
Investment, Unaffiliated Issuer [Member] | Software Sector [Member] | Kodiak Robotics, Inc. [Member] | Term Loan, Fixed Index Two [Member]
Principal Amount			250,000
Investment, Unaffiliated Issuer [Member] | Software Sector [Member] | Noodle Partners, Inc. [Member] | Term Loan, Prime Index, One [Member]
Principal Amount	8,750,000		10,000,000
Investment, Unaffiliated Issuer [Member] | Software Sector [Member] | Noodle Partners, Inc. [Member] | Term Loan, Prime Index, Two [Member]
Principal Amount	4,375,000		5,000,000
Investment, Unaffiliated Issuer [Member] | Software Sector [Member] | Noodle Partners, Inc. [Member] | Term Loan, Prime Index, Three [Member]
Principal Amount	4,375,000		5,000,000
Investment, Unaffiliated Issuer [Member] | Software Sector [Member] | BrightInsight, Inc. [Member] | Term Loan, Prime Index, One [Member]
Principal Amount	7,000,000		7,000,000
Investment, Unaffiliated Issuer [Member] | Software Sector [Member] | BrightInsight, Inc. [Member] | Term Loan, Prime Index, Two [Member]
Principal Amount	3,500,000		3,500,000
Investment, Unaffiliated Issuer [Member] | Software Sector [Member] | BrightInsight, Inc. [Member] | Term Loan, Prime Index, Three [Member]
Principal Amount	3,500,000		3,500,000
Investment, Unaffiliated Issuer [Member] | Software Sector [Member] | BrightInsight, Inc. [Member] | Term Loan, Prime Index, Four [Member]
Principal Amount	2,750,000		2,750,000
Investment, Unaffiliated Issuer [Member] | Software Sector [Member] | OneNetworks, Inc. dba Finexio [Member] | Term Loan, Prime Index, One [Member]
Principal Amount			2,500,000
Investment, Unaffiliated Issuer [Member] | Software Sector [Member] | OneNetworks, Inc. dba Finexio [Member] | Term Loan, Prime Index, Two [Member]
Principal Amount			2,500,000
Investment, Unaffiliated Issuer [Member] | Software Sector [Member] | Mirantis, Inc [Member] | Term Loan, Prime Index, One [Member]
Principal Amount	5,000,000		5,000,000
Investment, Unaffiliated Issuer [Member] | Software Sector [Member] | Mirantis, Inc [Member] | Term Loan, Prime Index, Two [Member]
Principal Amount	5,000,000		5,000,000
Investment, Unaffiliated Issuer [Member] | Software Sector [Member] | Mirantis, Inc [Member] | Term Loan, Prime Index, Three [Member]
Principal Amount	5,000,000		5,000,000
Investment, Unaffiliated Issuer [Member] | Software Sector [Member] | Mirantis, Inc [Member] | Term Loan, Prime Index, Four [Member]
Principal Amount	5,000,000		5,000,000
Investment, Unaffiliated Issuer [Member] | Software Sector [Member] | MasteryPrep, LLC [Member] | Term Loan, Prime Index, One [Member]
Principal Amount	7,500,000
Investment, Unaffiliated Issuer [Member] | Software Sector [Member] | MasteryPrep, LLC [Member] | Term Loan, Prime Index, Two [Member]
Principal Amount	7,500,000
Investment, Unaffiliated Issuer [Member] | Software Sector [Member] | Elligo Health Research, Inc [Member] | Term Loan, Prime Index, One [Member]
Principal Amount	10,000,000		10,000,000
Investment, Unaffiliated Issuer [Member] | Software Sector [Member] | Elligo Health Research, Inc [Member] | Term Loan, Prime Index, Two [Member]
Principal Amount	5,000,000		5,000,000
Investment, Unaffiliated Issuer [Member] | Software Sector [Member] | Elligo Health Research, Inc [Member] | Term Loan, Prime Index, Three [Member]
Principal Amount	5,000,000		5,000,000
Investment, Unaffiliated Issuer [Member] | Software Sector [Member] | Elligo Health Research, Inc [Member] | Term Loan, Prime Index, Four [Member]
Principal Amount	5,000,000		5,000,000
Investment, Unaffiliated Issuer [Member] | Software Sector [Member] | Ursa Space Systems Inc. [Member] | Term Loan, Prime Index, One [Member]
Principal Amount	2,500,000		2,500,000
Investment, Unaffiliated Issuer [Member] | Software Sector [Member] | Ursa Space Systems Inc. [Member] | Term Loan, Prime Index, Two [Member]
Principal Amount	2,500,000		2,500,000
Investment, Unaffiliated Issuer [Member] | Software Sector [Member] | Viken Detection Corporation [Member] | Term Loan, Prime Index, One [Member]
Principal Amount	4,000,000		4,833,000
Investment, Unaffiliated Issuer [Member] | Software Sector [Member] | Viken Detection Corporation [Member] | Term Loan, Prime Index, Two [Member]
Principal Amount	2,000,000		2,417,000
Investment, Unaffiliated Issuer [Member] | Software Sector [Member] | Viken Detection Corporation [Member] | Term Loan, Prime Index, Three [Member]
Principal Amount	2,000,000		2,417,000
Investment, Unaffiliated Issuer [Member] | Software Sector [Member] | SafelyYou, Inc [Member] | Term Loan, Prime Index, One [Member]
Principal Amount	5,000,000		5,000,000
Investment, Unaffiliated Issuer [Member] | Software Sector [Member] | SafelyYou, Inc [Member] | Term Loan, Prime Index, Two [Member]
Principal Amount	5,000,000		5,000,000
Investment, Unaffiliated Issuer [Member] | Software Sector [Member] | Supply Network Visibility Holdings, LLC [Member] | Term Loan, Prime Index, One [Member]
Principal Amount	2,500,000		2,500,000
Investment, Unaffiliated Issuer [Member] | Software Sector [Member] | Supply Network Visibility Holdings, LLC [Member] | Term Loan, Prime Index, Two [Member]
Principal Amount	3,500,000		3,500,000
Investment, Unaffiliated Issuer [Member] | Software Sector [Member] | Supply Network Visibility Holdings, LLC [Member] | Term Loan, Prime Index, Three [Member]
Principal Amount	2,500,000		2,500,000
Investment, Unaffiliated Issuer [Member] | Software Sector [Member] | Supply Network Visibility Holdings, LLC [Member] | Term Loan, Prime Index, Four [Member]
Principal Amount	1,500,000		1,500,000
Investment, Unaffiliated Issuer [Member] | Software Sector [Member] | Supply Network Visibility Holdings, LLC [Member] | Term Loan, Prime Index, Five [Member]
Principal Amount	5,000,000		5,000,000
Investment, Unaffiliated Issuer [Member] | Software Sector [Member] | Hound Labs, Inc. [Member] | Term Loan, Fixed Index One [Member]
Principal Amount			300,000
Investment, Unaffiliated Issuer [Member] | Software Sector [Member] | Britecore Holdings, Inc. [Member] | Term Loan, Prime Index, One [Member]
Principal Amount	5,000,000		5,000,000
Investment, Unaffiliated Issuer [Member] | Software Sector [Member] | Britecore Holdings, Inc. [Member] | Term Loan, Prime Index, Two [Member]
Principal Amount	2,500,000		2,500,000
Investment, Unaffiliated Issuer [Member] | Software Sector [Member] | Britecore Holdings, Inc. [Member] | Term Loan, Prime Index, Three [Member]
Principal Amount	2,500,000		2,500,000
Investment, Unaffiliated Issuer [Member] | Software Sector [Member] | Britecore Holdings, Inc. [Member] | Term Loan, Prime Index, Four [Member]
Principal Amount	2,500,000		2,500,000
Investment, Unaffiliated Issuer [Member] | Software Sector [Member] | Britecore Holdings, Inc. [Member] | Term Loan, Prime Index, Five [Member]
Principal Amount	2,500,000		2,500,000
Investment, Unaffiliated Issuer [Member] | Software Sector [Member] | Britecore Holdings, Inc. [Member] | Term Loan, Prime Index, Six [Member]
Principal Amount	2,500,000
Investment, Unaffiliated Issuer [Member] | Software Sector [Member] | Crafty Holdings, Inc.[Member] | Term Loan, Prime Index, One [Member]
Principal Amount	5,000,000		5,000,000
Investment, Unaffiliated Issuer [Member] | Software Sector [Member] | Crafty Holdings, Inc.[Member] | Term Loan, Prime Index, Two [Member]
Principal Amount			5,000,000
Investment, Unaffiliated Issuer [Member] | Software Sector [Member] | Crafty Holdings, Inc.[Member] | Term Loan, Prime Index, Three [Member]
Principal Amount			5,000,000
Investment, Unaffiliated Issuer [Member] | Software Sector [Member] | DropOff, Inc. [Member] | Term Loan, Prime Index, One [Member]
Principal Amount	6,804,000		6,804,000
Investment, Unaffiliated Issuer [Member] | Software Sector [Member] | DropOff, Inc. [Member] | Term Loan, Prime Index, Two [Member]
Principal Amount	6,280,000		6,280,000
Investment, Unaffiliated Issuer [Member] | Software Sector [Member] | DropOff, Inc. [Member] | Term Loan, Prime Index, Three [Member]
Principal Amount	2,617,000		2,617,000
Investment, Unaffiliated Issuer [Member] | Software Sector [Member] | HappyCo, Inc [Member] | Term Loan, Prime Index, One [Member]
Principal Amount	3,000,000
Investment, Unaffiliated Issuer [Member] | Software Sector [Member] | HappyCo, Inc [Member] | Term Loan, Prime Index, Two [Member]
Principal Amount	3,000,000
Investment, Unaffiliated Issuer [Member] | Software Sector [Member] | HappyCo, Inc [Member] | Term Loan, Prime Index, Three [Member]
Principal Amount	2,000,000
Investment, Unaffiliated Issuer [Member] | Biotechnology Sector [Member] | Avalo Therapeutics, Inc. [Member] | Common Stock Warrants [Member]
Investments at cost	311,000		311,000
Investments at fair value	$ 0		$ 0
Number of Shares (in shares)	117		117
Investment, Unaffiliated Issuer [Member] | Biotechnology Sector [Member] | Castle Creek Biosciences, Inc [Member] | Term Loan, Prime Index, One [Member]
Principal Amount			$ 3,333,000
Investment, Unaffiliated Issuer [Member] | Biotechnology Sector [Member] | Castle Creek Biosciences, Inc [Member] | Term Loan, Prime Index, Two [Member]
Principal Amount			3,333,000
Investment, Unaffiliated Issuer [Member] | Biotechnology Sector [Member] | Castle Creek Biosciences, Inc [Member] | Term Loan, Prime Index, Three [Member]
Principal Amount			2,000,000
Investment, Unaffiliated Issuer [Member] | Biotechnology Sector [Member] | Castle Creek Biosciences, Inc [Member] | Term Loan, Prime Index, Four [Member]
Principal Amount			3,333,000
Investment, Unaffiliated Issuer [Member] | Biotechnology Sector [Member] | Castle Creek Biosciences, Inc [Member] | Term Loan, Prime Index, Five [Member]
Principal Amount			3,333,000
Investment, Unaffiliated Issuer [Member] | Biotechnology Sector [Member] | Castle Creek Biosciences, Inc [Member] | Term Loan, Prime Index, Six [Member]
Principal Amount			2,000,000
Investment, Unaffiliated Issuer [Member] | Biotechnology Sector [Member] | Castle Creek Biosciences, Inc [Member] | Preferred Stock Warrants [Member]
Investments at cost	$ 279,000		214,000
Investments at fair value	$ 257,000		$ 270,000
Number of Shares (in shares)	9,775		7,404
Investment, Unaffiliated Issuer [Member] | Biotechnology Sector [Member] | Castle Creek Biosciences, Inc [Member] | Term Loan, Prime Index, One [Member]
Principal Amount	$ 10,000,000
Investment, Unaffiliated Issuer [Member] | Biotechnology Sector [Member] | Castle Creek Biosciences, Inc [Member] | Term Loan, Prime Index, Two [Member]
Principal Amount	5,500,000
Investment, Unaffiliated Issuer [Member] | Biotechnology Sector [Member] | Castle Creek Biosciences, Inc [Member] | Term Loan, Prime Index, Three [Member]
Principal Amount	5,000,000
Investment, Unaffiliated Issuer [Member] | Biotechnology Sector [Member] | Castle Creek Biosciences, Inc [Member] | Term Loan, Prime Index, Four [Member]
Principal Amount	5,000,000
Investment, Unaffiliated Issuer [Member] | Biotechnology Sector [Member] | Emalex Biosciences, Inc. [Member] | Term Loan, Prime Index, One [Member]
Principal Amount			$ 4,167,000
Investment, Unaffiliated Issuer [Member] | Biotechnology Sector [Member] | Emalex Biosciences, Inc. [Member] | Term Loan, Prime Index, Two [Member]
Principal Amount			5,000,000
Investment, Unaffiliated Issuer [Member] | Biotechnology Sector [Member] | Emalex Biosciences, Inc. [Member] | Preferred Stock Warrants [Member]
Investments at cost	176,000		176,000
Investments at fair value	$ 452,000		$ 129,000
Number of Shares (in shares)	110,402		110,402
Investment, Unaffiliated Issuer [Member] | Biotechnology Sector [Member] | Emalex Biosciences, Inc. [Member] | Term Loan, Prime Index, One [Member]
Principal Amount	$ 1,667,000
Investment, Unaffiliated Issuer [Member] | Biotechnology Sector [Member] | Emalex Biosciences, Inc. [Member] | Term Loan, Prime Index, Two [Member]
Principal Amount	4,167,000
Investment, Unaffiliated Issuer [Member] | Biotechnology Sector [Member] | Imunon, Inc [Member] | Common Stock Warrants [Member]
Investments at cost	65,000		$ 65,000
Investments at fair value	$ 0		$ 0
Number of Shares (in shares)	19,671		19,671
Investment, Unaffiliated Issuer [Member] | Biotechnology Sector [Member] | KSQ Therapeutics, Inc. [Member] | Term Loan, Prime Index, One [Member]
Principal Amount			$ 6,250,000
Investment, Unaffiliated Issuer [Member] | Biotechnology Sector [Member] | KSQ Therapeutics, Inc. [Member] | Term Loan, Prime Index, Two [Member]
Principal Amount			6,250,000
Investment, Unaffiliated Issuer [Member] | Biotechnology Sector [Member] | KSQ Therapeutics, Inc. [Member] | Preferred Stock Warrants [Member]
Investments at cost	$ 118,000		50,000
Investments at fair value	$ 125,000		$ 53,000
Number of Shares (in shares)	105,768		48,076
Investment, Unaffiliated Issuer [Member] | Biotechnology Sector [Member] | KSQ Therapeutics, Inc. [Member] | Term Loan, Prime Index, One [Member]
Principal Amount	$ 4,750,000
Investment, Unaffiliated Issuer [Member] | Biotechnology Sector [Member] | KSQ Therapeutics, Inc. [Member] | Term Loan, Prime Index, Two [Member]
Principal Amount	4,750,000
Investment, Unaffiliated Issuer [Member] | Biotechnology Sector [Member] | KSQ Therapeutics, Inc. [Member] | Term Loan, Prime Index, Three [Member]
Principal Amount	4,750,000
Investment, Unaffiliated Issuer [Member] | Biotechnology Sector [Member] | KSQ Therapeutics, Inc. [Member] | Term Loan, Prime Index, Four [Member]
Principal Amount	4,750,000
Investment, Unaffiliated Issuer [Member] | Biotechnology Sector [Member] | BioVaxys Technology Corp. [Member] | Common Stock Warrants [Member]
Investments at cost	5,000
Investments at fair value	$ 3,000
Number of Shares (in shares)	2,800,000
Investment, Unaffiliated Issuer [Member] | Biotechnology Sector [Member] | Mustang Bio, Inc [Member] | Common Stock Warrants [Member]
Investments at cost	$ 146,000		$ 146,000
Investments at fair value	$ 0		$ 0
Number of Shares (in shares)	568		16,611
Investment, Unaffiliated Issuer [Member] | Biotechnology Sector [Member] | Native Microbials, Inc. [Member] | Term Loan, Prime Index, One [Member]
Principal Amount			$ 2,875,000
Investment, Unaffiliated Issuer [Member] | Biotechnology Sector [Member] | Native Microbials, Inc. [Member] | Term Loan, Prime Index, Two [Member]
Principal Amount			1,917,000
Investment, Unaffiliated Issuer [Member] | Biotechnology Sector [Member] | Native Microbials, Inc. [Member] | Preferred Stock Warrants [Member]
Investments at cost	$ 73,000		73,000
Investments at fair value	$ 64,000		$ 68,000
Number of Shares (in shares)	112,879		112,879
Investment, Unaffiliated Issuer [Member] | Biotechnology Sector [Member] | Native Microbials, Inc. [Member] | Term Loan, Prime Index, One [Member]
Principal Amount	$ 2,125,000
Investment, Unaffiliated Issuer [Member] | Biotechnology Sector [Member] | Native Microbials, Inc. [Member] | Term Loan, Prime Index, Two [Member]
Principal Amount	1,417,000
Investment, Unaffiliated Issuer [Member] | Biotechnology Sector [Member] | PDS Biotechnology Corporation [Member] | Term Loan, Prime Index, One [Member]
Principal Amount			$ 8,750,000
Investment, Unaffiliated Issuer [Member] | Biotechnology Sector [Member] | PDS Biotechnology Corporation [Member] | Term Loan, Prime Index, Two [Member]
Principal Amount			3,281,000
Investment, Unaffiliated Issuer [Member] | Biotechnology Sector [Member] | PDS Biotechnology Corporation [Member] | Term Loan, Prime Index, Three [Member]
Principal Amount			3,281,000
Investment, Unaffiliated Issuer [Member] | Biotechnology Sector [Member] | PDS Biotechnology Corporation [Member] | Common Stock Warrants [Member]
Investments at cost	160,000		160,000
Investments at fair value	$ 4,000		$ 14,000
Number of Shares (in shares)	299,848		299,848
Investment, Unaffiliated Issuer [Member] | Biotechnology Sector [Member] | Provivi, Inc. [Member] | Term Loan, Prime Index, One [Member]
Principal Amount			$ 3,482,000
Investment, Unaffiliated Issuer [Member] | Biotechnology Sector [Member] | Provivi, Inc. [Member] | Term Loan, Prime Index, Two [Member]
Principal Amount			3,482,000
Investment, Unaffiliated Issuer [Member] | Biotechnology Sector [Member] | Provivi, Inc. [Member] | Term Loan, Prime Index, Three [Member]
Principal Amount			1,741,000
Investment, Unaffiliated Issuer [Member] | Biotechnology Sector [Member] | Provivi, Inc. [Member] | Term Loan, Prime Index, Four [Member]
Principal Amount			1,741,000
Investment, Unaffiliated Issuer [Member] | Biotechnology Sector [Member] | Provivi, Inc. [Member] | Term Loan, Prime Index, Five [Member]
Principal Amount			1,741,000
Investment, Unaffiliated Issuer [Member] | Biotechnology Sector [Member] | Provivi, Inc. [Member] | Term Loan, Prime Index, Six [Member]
Principal Amount			1,741,000
Investment, Unaffiliated Issuer [Member] | Biotechnology Sector [Member] | Provivi, Inc. [Member] | Common Stock Warrants [Member]
Investments at cost	$ 278,000		278,000
Investments at fair value	$ 0		$ 0
Number of Shares (in shares)	175,098		175,098
Investment, Unaffiliated Issuer [Member] | Biotechnology Sector [Member] | Provivi, Inc. [Member] | Preferred Stock Warrants [Member]
Investments at cost	$ 312,000		$ 312,000
Investments at fair value	$ 0		$ 59,000
Number of Shares (in shares)	709,980		709,980
Investment, Unaffiliated Issuer [Member] | Biotechnology Sector [Member] | Provivi, Inc. [Member] | Term Loan, Prime Index, One [Member]
Principal Amount	$ 3,482,000
Investment, Unaffiliated Issuer [Member] | Biotechnology Sector [Member] | Provivi, Inc. [Member] | Term Loan, Prime Index, Two [Member]
Principal Amount	3,482,000
Investment, Unaffiliated Issuer [Member] | Biotechnology Sector [Member] | Provivi, Inc. [Member] | Term Loan, Prime Index, Three [Member]
Principal Amount	1,741,000
Investment, Unaffiliated Issuer [Member] | Biotechnology Sector [Member] | Provivi, Inc. [Member] | Term Loan, Prime Index, Four [Member]
Principal Amount	1,741,000
Investment, Unaffiliated Issuer [Member] | Biotechnology Sector [Member] | Provivi, Inc. [Member] | Term Loan, Prime Index, Five [Member]
Principal Amount	1,741,000
Investment, Unaffiliated Issuer [Member] | Biotechnology Sector [Member] | Provivi, Inc. [Member] | Term Loan, Prime Index, Six [Member]
Principal Amount	1,741,000
Investment, Unaffiliated Issuer [Member] | Biotechnology Sector [Member] | Greenlight Biosciences, Inc [Member] | Term Loan, Prime Index, One [Member]
Principal Amount			$ 1,000,000
Investment, Unaffiliated Issuer [Member] | Biotechnology Sector [Member] | Greenlight Biosciences, Inc [Member] | Term Loan, Prime Index, Two [Member]
Principal Amount			500,000
Investment, Unaffiliated Issuer [Member] | Biotechnology Sector [Member] | Greenlight Biosciences, Inc [Member] | Term Loan, Prime Index, One [Member]
Principal Amount	167,000
Investment, Unaffiliated Issuer [Member] | Biotechnology Sector [Member] | Greenlight Biosciences, Inc [Member] | Term Loan, Prime Index, Two [Member]
Principal Amount	83,000
Investment, Unaffiliated Issuer [Member] | Biotechnology Sector [Member] | Stealth BioTherapeutics Inc. [Member] | Term Loan, Prime Index, One [Member]
Principal Amount			2,024,000
Investment, Unaffiliated Issuer [Member] | Biotechnology Sector [Member] | Stealth BioTherapeutics Inc. [Member] | Term Loan, Prime Index, Two [Member]
Principal Amount			1,012,000
Investment, Unaffiliated Issuer [Member] | Biotechnology Sector [Member] | Stealth BioTherapeutics Inc. [Member] | Common Stock Warrants [Member]
Investments at cost	264,000		264,000
Investments at fair value	$ 5,000		$ 0
Number of Shares (in shares)	318,181		318,181
Investment, Unaffiliated Issuer [Member] | Biotechnology Sector [Member] | Stealth BioTherapeutics Inc. [Member] | Term Loan, Prime Index, One [Member]
Principal Amount	$ 810,000
Investment, Unaffiliated Issuer [Member] | Biotechnology Sector [Member] | Stealth BioTherapeutics Inc. [Member] | Term Loan, Prime Index, Two [Member]
Principal Amount	405,000
Investment, Unaffiliated Issuer [Member] | Biotechnology Sector [Member] | Tallac Therapeutics, Inc [Member] | Term Loan, Prime Index, One [Member]
Principal Amount			$ 2,500,000
Investment, Unaffiliated Issuer [Member] | Biotechnology Sector [Member] | Tallac Therapeutics, Inc [Member] | Term Loan, Prime Index, Two [Member]
Principal Amount			2,500,000
Investment, Unaffiliated Issuer [Member] | Biotechnology Sector [Member] | Tallac Therapeutics, Inc [Member] | Preferred Stock Warrants [Member]
Investments at cost	198,000		194,000
Investments at fair value	$ 0		$ 167,000
Number of Shares (in shares)	2,266,669		1,600,002
Investment, Unaffiliated Issuer [Member] | Biotechnology Sector [Member] | Tallac Therapeutics, Inc [Member] | Term Loan, Prime Index, One [Member]
Principal Amount	$ 2,500,000
Investment, Unaffiliated Issuer [Member] | Biotechnology Sector [Member] | Tallac Therapeutics, Inc [Member] | Term Loan, Prime Index, Two [Member]
Principal Amount	2,500,000
Investment, Unaffiliated Issuer [Member] | Biotechnology Sector [Member] | Xeris Pharmaceuticals, Inc [Member] | Common Stock Warrants [Member]
Investments at cost	73,000		$ 73,000
Investments at fair value	$ 229,000		$ 91,000
Number of Shares (in shares)	126,000		126,000
Investment, Unaffiliated Issuer [Member] | Biotechnology Sector [Member] | Long Grove Pharmaceuticals, LLC [Member] | Term Loan, SOFR Index, One [Member]
Principal Amount	$ 10,138,000
Investment, Unaffiliated Issuer [Member] | Life Science Segment [Member] | Debt Securities [Member]
Investments at cost	288,355,000		$ 263,280,000
Investments at fair value	275,746,000		261,520,000
Investment, Unaffiliated Issuer [Member] | Life Science Segment [Member] | Warrant [Member]
Investments at cost	5,206,000		5,149,000
Investments at fair value	5,988,000		6,374,000
Investment, Unaffiliated Issuer [Member] | Life Science Segment [Member] | Magnolia Medical Technologies, Inc [Member] | Preferred Stock Warrants [Member]
Investments at cost	194,000		194,000
Investments at fair value	$ 549,000		$ 368,000
Number of Shares (in shares)	900,043		809,931
Investment, Unaffiliated Issuer [Member] | Life Science Segment [Member] | VERO Biotech LLC [Member] | Preferred Stock Warrants [Member]
Investments at cost	$ 377,000		$ 376,000
Investments at fair value	$ 191,000		$ 198,000
Number of Shares (in shares)	3,701		3,701
Investment, Unaffiliated Issuer [Member] | Life Science Segment [Member] | Meditrina, Inc [Member] | Preferred Stock Warrants [Member]
Investments at cost	$ 83,000		$ 83,000
Investments at fair value	$ 31,000		$ 34,000
Number of Shares (in shares)	233,993		233,993
Investment, Unaffiliated Issuer [Member] | Life Science Segment [Member] | MicroTransponder, Inc. [Member] | Preferred Stock Warrants [Member]
Investments at cost	$ 47,000		$ 47,000
Investments at fair value	$ 50,000		$ 66,000
Number of Shares (in shares)	103,172		103,172
Investment, Unaffiliated Issuer [Member] | Life Science Segment [Member] | Onkos Surgical, Inc. [Member] | Preferred Stock Warrants [Member]
Investments at cost	$ 192,000		$ 192,000
Investments at fair value	$ 221,000		$ 187,000
Number of Shares (in shares)	443,674		443,674
Investment, Unaffiliated Issuer [Member] | Life Science Segment [Member] | Scientia Vascular, Inc. [Member] | Preferred Stock Warrants [Member]
Investments at cost	$ 163,000		$ 103,000
Investments at fair value	$ 487,000		$ 262,000
Number of Shares (in shares)	58,410		34,410
Investment, Unaffiliated Issuer [Member] | Life Science Segment [Member] | Sonex Health, Inc. [Member] | Preferred Stock Warrants [Member]
Investments at cost	$ 275,000		$ 275,000
Investments at fair value	$ 258,000		$ 266,000
Number of Shares (in shares)	2,637,133		2,637,133
Investment, Unaffiliated Issuer [Member] | Life Science Segment [Member] | Spineology, Inc [Member] | Common Stock Warrants [Member]
Investments at cost	$ 143,000		$ 143,000
Investments at fair value	$ 107,000		$ 108,000
Number of Shares (in shares)	27,139		2,714,033
Investment, Unaffiliated Issuer [Member] | Life Science Segment [Member] | Spineology, Inc [Member] | Preferred Stock Warrants [Member]
Investments at cost	$ 17,000		$ 16,000
Investments at fair value	$ 28,000		$ 28,000
Number of Shares (in shares)	22,551		2,255,155
Investment, Unaffiliated Issuer [Member] | Life Science Segment [Member] | Lumithera, Inc. [Member] | Royalty Agreement [Member]
Investments at cost	$ 1,116,000		$ 1,146,000
Investments at fair value	0		100,000
Investment, Unaffiliated Issuer [Member] | Life Science Segment [Member] | Robin Healthcare, Inc. [Member] | Royalty Agreement [Member]
Investments at cost	7,330,000		7,319,000
Investments at fair value	0		0
Investment, Unaffiliated Issuer [Member] | Technology Sector [Member]
Investments at cost			8,918,000
Investments at fair value			10,650,000
Investment, Unaffiliated Issuer [Member] | Technology Sector [Member] | Debt Securities [Member]
Investments at cost	202,437,000		222,699,000
Investments at fair value	173,265,000		198,350,000
Investment, Unaffiliated Issuer [Member] | Technology Sector [Member] | Warrant [Member]
Investments at cost	8,483,000
Investments at fair value	12,385,000
Investment, Unaffiliated Issuer [Member] | Technology Sector [Member] | Havenly, Inc. [Member] | Common Stock Warrants [Member]
Investments at cost	3,178,000		3,178,000
Investments at fair value	$ 3,107,000		$ 3,106,000
Number of Shares (in shares)	1,446,429		1,446,429
Investment, Unaffiliated Issuer [Member] | Technology Sector [Member] | Kodiak Robotics, Inc. [Member] | Preferred Stock Warrants [Member]
Investments at cost	$ 273,000		$ 273,000
Investments at fair value	$ 2,551,000		$ 15,000
Number of Shares (in shares)	639,918		639,918
Investment, Unaffiliated Issuer [Member] | Technology Sector [Member] | Noodle Partners, Inc. [Member] | Preferred Stock Warrants [Member]
Investments at cost	$ 116,000		$ 116,000
Investments at fair value	$ 0		$ 0
Number of Shares (in shares)	84,037		84,037
Investment, Unaffiliated Issuer [Member] | Technology Sector [Member] | OneNetworks, Inc. dba Finexio [Member] | Preferred Stock Warrants [Member]
Investments at cost	$ 3,000		$ 3,000
Investments at fair value	$ 3,000		$ 3,000
Number of Shares (in shares)	184,646		184,646
Investment, Unaffiliated Issuer [Member] | Technology Sector [Member] | Revinate Holdings, Inc [Member] | Preferred Stock Warrants [Member]
Investments at cost	$ 44,000		$ 44,000
Investments at fair value	$ 87,000		$ 90,000
Number of Shares (in shares)	682,034		682,034
Investment, Unaffiliated Issuer [Member] | Technology Sector [Member] | SIGNiX, Inc [Member] | Preferred Stock Warrants [Member]
Investments at cost	$ 177,000		$ 225,000
Investments at fair value	$ 0		$ 0
Number of Shares (in shares)	186,235		186,235
Investment, Unaffiliated Issuer [Member] | Technology Sector [Member] | Mirantis, Inc [Member] | Common Stock Warrants [Member]
Investments at cost	$ 223,000		$ 223,000
Investments at fair value	$ 425,000		$ 585,000
Number of Shares (in shares)	948,275		948,275
Investment, Unaffiliated Issuer [Member] | Technology Sector [Member] | Slingshot Aerospace, Inc. [Member] | Preferred Stock Warrants [Member]
Investments at cost	$ 123,000		$ 123,000
Investments at fair value	$ 30,000		$ 66,000
Number of Shares (in shares)	309,208		309,208
Investment, Unaffiliated Issuer [Member] | Technology Sector [Member] | NextCar Holding Company, Inc [Member] | Common Stock Warrants [Member]
Investments at cost	$ 188,000		$ 188,000
Investments at fair value	$ 0		$ 0
Number of Shares (in shares)	12,618		12,618
Investment, Unaffiliated Issuer [Member] | Technology Sector [Member] | NextCar Holding Company, Inc [Member] | Preferred Stock Warrants [Member]
Investments at cost	$ 9,000		$ 9,000
Investments at fair value	$ 0		$ 0
Number of Shares (in shares)	3,913,723		3,913,723
Investment, Unaffiliated Issuer [Member] | Technology Sector [Member] | Supply Network Visiblity Holdings LLC [Member] | Preferred Stock Warrants [Member]
Investments at cost	$ 64,000		$ 65,000
Investments at fair value	$ 73,000		$ 75,000
Number of Shares (in shares)	682		682
Investment, Unaffiliated Issuer [Member] | Technology Sector [Member] | Topia Mobility, Inc [Member] | Preferred Stock Warrants [Member]
Investments at cost	$ 138,000		$ 138,000
Investments at fair value	$ 0		$ 0
Number of Shares (in shares)	30,496		30,496
Investment, Unaffiliated Issuer [Member] | Technology Sector [Member] | Ursa Space Systems Inc. [Member] | Preferred Stock Warrants [Member]
Investments at cost	$ 151,000		$ 151,000
Investments at fair value	$ 144,000		$ 148,000
Number of Shares (in shares)	1,075,072		1,075,072
Investment, Unaffiliated Issuer [Member] | Technology Sector [Member] | Viken Detection Corporation [Member] | Preferred Stock Warrants [Member]
Investments at cost	$ 120,000		$ 120,000
Investments at fair value	$ 374,000		$ 234,000
Number of Shares (in shares)	345,443		345,443
Investment, Unaffiliated Issuer [Member] | Technology Sector [Member] | xAd, Inc [Member] | Preferred Stock Warrants [Member]
Investments at cost	$ 177,000		$ 177,000
Investments at fair value	$ 6,000		$ 6,000
Number of Shares (in shares)	4,343,348		4,343,348
Investment, Unaffiliated Issuer [Member] | Technology Sector [Member] | Optoro, Inc. [Member] | Preferred Stock Warrants [Member]
Investments at cost	$ 182,000		$ 182,000
Investments at fair value	$ 0		$ 99,000
Number of Shares (in shares)	11,550		11,550
Investment, Unaffiliated Issuer [Member] | Technology Sector [Member] | Standvast Holdings, LLC [Member] | Preferred Stock Warrants [Member]
Investments at cost			$ 275,000
Investments at fair value			$ 0
Number of Shares (in shares)			1,225,492
Investment, Unaffiliated Issuer [Member] | Technology Sector [Member] | Britecore Holdings, Inc. [Member] | Preferred Stock Warrants [Member]
Investments at cost	$ 98,000		$ 98,000
Investments at fair value	$ 237,000		$ 289,000
Number of Shares (in shares)	161,215		161,215
Investment, Unaffiliated Issuer [Member] | Technology Sector [Member] | Axiom Space, Inc [Member] | Common Stock Warrants [Member]
Investments at cost	$ 45,000		$ 46,000
Investments at fair value	$ 24,000		$ 35,000
Number of Shares (in shares)	1,991		1,991
Investment, Unaffiliated Issuer [Member] | Technology Sector [Member] | Unagi, Inc [Member] | Preferred Stock Warrants [Member]
Investments at cost			$ 32,000
Investments at fair value			$ 0
Number of Shares (in shares)			171,081
Investment, Unaffiliated Issuer [Member] | Technology Sector [Member] | Intelepeer Holdings, Inc [Member] | Preferred Stock Warrants [Member]
Investments at cost	$ 138,000		$ 138,000
Investments at fair value	$ 3,129,000		$ 3,156,000
Number of Shares (in shares)	2,936,535		2,936,535
Investment, Unaffiliated Issuer [Member] | Technology Sector [Member] | Alula Holdings, Inc [Member] | Preferred Stock Warrants [Member]
Investments at cost	$ 93,000		$ 93,000
Investments at fair value	$ 7,000		$ 7,000
Number of Shares (in shares)	20,000		20,000
Investment, Unaffiliated Issuer [Member] | Technology Sector [Member] | CAMP NYC, Inc [Member] | Preferred Stock Warrants [Member]
Investments at cost	$ 36,000		$ 36,000
Investments at fair value	$ 39,000		$ 40,000
Number of Shares (in shares)	112,356		112,356
Investment, Unaffiliated Issuer [Member] | Technology Sector [Member] | Fictiv, Inc. [Member] | Common Stock Warrants [Member]
Investments at cost			$ 59,000
Investments at fair value			$ 77,000
Number of Shares (in shares)			126,841
Investment, Unaffiliated Issuer [Member] | Technology Sector [Member] | Clara Foods Co [Member] | Preferred Stock Warrants [Member]
Investments at cost	$ 30,000		$ 30,000
Investments at fair value	$ 42,000		$ 43,000
Number of Shares (in shares)	46,745		46,745
Investment, Unaffiliated Issuer [Member] | Technology Sector [Member] | Divergent Technologies, Inc. [Member] | Common Stock Warrants [Member]
Investments at cost	$ 79,000		$ 79,000
Investments at fair value	$ 4,000		$ 7,000
Number of Shares (in shares)	9,801		9,801
Investment, Unaffiliated Issuer [Member] | Technology Sector [Member] | Divergent Technologies, Inc. [Member] | Preferred Stock Warrants [Member]
Investments at cost	$ 454,000		$ 454,000
Investments at fair value	$ 442,000		$ 440,000
Number of Shares (in shares)	45,273		45,273
Investment, Unaffiliated Issuer [Member] | Technology Sector [Member] | Crafty Holdings, Inc.[Member] | Common Stock Warrants [Member]
Investments at cost	$ 132,000		$ 132,000
Investments at fair value	$ 132,000		$ 132,000
Number of Shares (in shares)	243,278		243,278
Investment, Unaffiliated Issuer [Member] | Technology Sector [Member] | MyForest Foods Co [Member] | Preferred Stock Warrants [Member]
Investments at cost	$ 29,000		$ 29,000
Investments at fair value	$ 24,000		$ 25,000
Number of Shares (in shares)	250		250
Investment, Unaffiliated Issuer [Member] | Technology Sector [Member] | DropOff, Inc. [Member] | Common Stock Warrants [Member]
Investments at cost	$ 455,000		$ 455,000
Investments at fair value	$ 0		$ 0
Number of Shares (in shares)	516,535		516,535
Investment, Unaffiliated Issuer [Member] | Technology Sector [Member] | HappyCo, Inc [Member] | Preferred Stock Warrants [Member]
Investments at cost	$ 26,000
Investments at fair value	$ 23,000
Number of Shares (in shares)	96,228
Investment, Unaffiliated Issuer [Member] | Technology Sector [Member] | Primary Kids, Inc [Member] | Preferred Stock Warrants [Member]
Investments at cost	$ 57,000		$ 57,000
Investments at fair value	$ 333,000		$ 412,000
Number of Shares (in shares)	553,778		553,778
Investment, Unaffiliated Issuer [Member] | Technology Sector [Member] | Quip NYC Inc [Member] | Preferred Stock Warrants [Member]
Investments at cost	$ 325,000		$ 325,000
Investments at fair value	$ 0		$ 0
Number of Shares (in shares)	6,191		6,191
Investment, Unaffiliated Issuer [Member] | Technology Sector [Member] | Updater, Inc [Member] | Preferred Stock Warrants [Member]
Investments at cost	$ 34,000		$ 34,000
Investments at fair value	$ 26,000		$ 26,000
Number of Shares (in shares)	108,333		108,333
Investment, Unaffiliated Issuer [Member] | Technology Sector [Member] | CPG Beyond, Inc [Member] | Preferred Stock Warrants [Member]
Investments at cost	$ 242,000		$ 242,000
Investments at fair value	$ 226,000		$ 231,000
Number of Shares (in shares)	500,000		500,000
Investment, Unaffiliated Issuer [Member] | Technology Sector [Member] | Silk, Inc [Member] | Preferred Stock Warrants [Member]
Investments at cost	$ 175,000		$ 175,000
Investments at fair value	$ 104,000		$ 119,000
Number of Shares (in shares)	394,110		394,110
Investment, Unaffiliated Issuer [Member] | Technology Sector [Member] | Global Worldwide LLC [Member] | Preferred Stock Warrants [Member]
Investments at cost	$ 75,000		$ 75,000
Investments at fair value	$ 0		$ 0
Number of Shares (in shares)	245,810		245,810
Investment, Unaffiliated Issuer [Member] | Technology Sector [Member] | Rocket Lawyer Incorporated [Member] | Preferred Stock Warrants [Member]
Investments at cost	$ 92,000		$ 92,000
Investments at fair value	$ 216,000		$ 319,000
Number of Shares (in shares)	261,721		261,721
Investment, Unaffiliated Issuer [Member] | Technology Sector [Member] | Skillshare, Inc [Member] | Preferred Stock Warrants [Member]
Investments at cost	$ 162,000		$ 162,000
Investments at fair value	$ 389,000		$ 680,000
Number of Shares (in shares)	139,074		139,074
Investment, Unaffiliated Issuer [Member] | Technology Sector [Member] | Liqid, Inc [Member] | Preferred Stock Warrants [Member]
Investments at cost	$ 364,000		$ 364,000
Investments at fair value	$ 121,000		$ 103,000
Number of Shares (in shares)	344,102		344,102
Investment, Unaffiliated Issuer [Member] | Technology Sector [Member] | Avalanche Technology, Inc [Member] | Preferred Stock Warrants [Member]
Investments at cost			$ 45,000
Investments at fair value			$ 0
Number of Shares (in shares)			5,938
Investment, Unaffiliated Issuer [Member] | Technology Sector [Member] | E La Carte, Inc [Member] | Common Stock Warrants [Member]
Investments at cost	$ 60,000		$ 60,000
Investments at fair value	$ 0		$ 0
Number of Shares (in shares)	147,361		147,361
Investment, Unaffiliated Issuer [Member] | Technology Sector [Member] | Everstream Holdings, LLC [Member] | Preferred Stock Warrants [Member]
Investments at cost	$ 82,000		$ 82,000
Investments at fair value	$ 24,000		$ 34,000
Number of Shares (in shares)	525,000		525,000
Investment, Unaffiliated Issuer [Member] | Technology Sector [Member] | Lemongrass Holdings, Inc [Member] | Preferred Stock Warrants [Member]
Investments at cost	$ 34,000		$ 34,000
Investments at fair value	$ 43,000		$ 48,000
Number of Shares (in shares)	101,308		101,308
Investment, Unaffiliated Issuer [Member] | Medical Device Sector [Member] | Ceribell, Inc. [Member] | Term Loan, Prime Index, One [Member]
Principal Amount	$ 5,000,000		$ 5,000,000
Investment, Unaffiliated Issuer [Member] | Medical Device Sector [Member] | Ceribell, Inc. [Member] | Term Loan, Prime Index, Two [Member]
Principal Amount	5,000,000		5,000,000
Investment, Unaffiliated Issuer [Member] | Medical Device Sector [Member] | Ceribell, Inc. [Member] | Term Loan, Prime Index, Three [Member]
Principal Amount	4,000,000		4,000,000
Investment, Unaffiliated Issuer [Member] | Medical Device Sector [Member] | Ceribell, Inc. [Member] | Preferred Stock Warrants [Member]
Investments at cost	147,000		147,000
Investments at fair value	$ 927,000		$ 1,573,000
Number of Shares (in shares)	89,903		89,903
Investment, Unaffiliated Issuer [Member] | Medical Device Sector [Member] | VERO Biotech LLC [Member] | Term Loan, Prime Index, One [Member]
Principal Amount	$ 15,000,000		$ 15,000,000
Investment, Unaffiliated Issuer [Member] | Medical Device Sector [Member] | VERO Biotech LLC [Member] | Term Loan, Prime Index, Two [Member]
Principal Amount	10,000,000		10,000,000
Investment, Unaffiliated Issuer [Member] | Medical Device Sector [Member] | VERO Biotech LLC [Member] | Term Loan, Prime Index, Three [Member]
Principal Amount	5,000,000		5,000,000
Investment, Unaffiliated Issuer [Member] | Medical Device Sector [Member] | VERO Biotech LLC [Member] | Term Loan, Prime Index, Four [Member]
Principal Amount	2,500,000		2,500,000
Investment, Unaffiliated Issuer [Member] | Medical Device Sector [Member] | Candesant Biomedical, Inc. [Member] | Term Loan, Prime Index, One [Member]
Principal Amount			5,000,000
Investment, Unaffiliated Issuer [Member] | Medical Device Sector [Member] | Candesant Biomedical, Inc. [Member] | Term Loan, Prime Index, Two [Member]
Principal Amount			2,500,000
Investment, Unaffiliated Issuer [Member] | Medical Device Sector [Member] | Candesant Biomedical, Inc. [Member] | Term Loan, Prime Index, Three [Member]
Principal Amount			2,500,000
Investment, Unaffiliated Issuer [Member] | Medical Device Sector [Member] | Candesant Biomedical, Inc. [Member] | Preferred Stock Warrants [Member]
Investments at cost			152,000
Investments at fair value			$ 78,000
Number of Shares (in shares)			93,336
Investment, Unaffiliated Issuer [Member] | Medical Device Sector [Member] | MicroTransponder, Inc. [Member] | Term Loan, Prime Index, One [Member]
Principal Amount	3,750,000		$ 3,750,000
Investment, Unaffiliated Issuer [Member] | Medical Device Sector [Member] | MicroTransponder, Inc. [Member] | Term Loan, Prime Index, Two [Member]
Principal Amount	3,750,000		3,750,000
Investment, Unaffiliated Issuer [Member] | Medical Device Sector [Member] | Onkos Surgical, Inc. [Member] | Term Loan, Prime Index, One [Member]
Principal Amount	10,000,000		10,000,000
Investment, Unaffiliated Issuer [Member] | Medical Device Sector [Member] | Onkos Surgical, Inc. [Member] | Term Loan, Prime Index, Two [Member]
Principal Amount	10,000,000		10,000,000
Investment, Unaffiliated Issuer [Member] | Medical Device Sector [Member] | Onkos Surgical, Inc. [Member] | Term Loan, Prime Index, Three [Member]
Principal Amount	5,000,000		5,000,000
Investment, Unaffiliated Issuer [Member] | Medical Device Sector [Member] | Onkos Surgical, Inc. [Member] | Term Loan, Prime Index, Four [Member]
Principal Amount	5,000,000		5,000,000
Investment, Unaffiliated Issuer [Member] | Medical Device Sector [Member] | Conventus Orthopaedics, Inc [Member] | Term Loan, Prime Index, One [Member]
Principal Amount	2,801,000		3,187,000
Investment, Unaffiliated Issuer [Member] | Medical Device Sector [Member] | Conventus Orthopaedics, Inc [Member] | Term Loan, Prime Index, Two [Member]
Principal Amount	2,801,000		3,187,000
Investment, Unaffiliated Issuer [Member] | Medical Device Sector [Member] | Conventus Orthopaedics, Inc [Member] | Preferred Stock Warrants [Member]
Investments at cost	268,000		256,000
Investments at fair value	$ 1,000		$ 102,000
Number of Shares (in shares)	13,203,395		9,313,541
Investment, Unaffiliated Issuer [Member] | Medical Device Sector [Member] | Scientia Vascular, Inc. [Member] | Term Loan, Prime Index, One [Member]
Principal Amount	$ 10,000,000		$ 3,750,000
Investment, Unaffiliated Issuer [Member] | Medical Device Sector [Member] | Scientia Vascular, Inc. [Member] | Term Loan, Prime Index, Two [Member]
Principal Amount	10,000,000		3,750,000
Investment, Unaffiliated Issuer [Member] | Medical Device Sector [Member] | Scientia Vascular, Inc. [Member] | Term Loan, Prime Index, Three [Member]
Principal Amount	5,000,000		5,000,000
Investment, Unaffiliated Issuer [Member] | Medical Device Sector [Member] | Scientia Vascular, Inc. [Member] | Term Loan, Prime Index, Four [Member]
Principal Amount	1,500,000		5,000,000
Investment, Unaffiliated Issuer [Member] | Medical Device Sector [Member] | Sonex Health, Inc. [Member] | Term Loan, Prime Index, One [Member]
Principal Amount	2,500,000		2,500,000
Investment, Unaffiliated Issuer [Member] | Medical Device Sector [Member] | Sonex Health, Inc. [Member] | Term Loan, Prime Index, Two [Member]
Principal Amount	2,500,000		2,500,000
Investment, Unaffiliated Issuer [Member] | Medical Device Sector [Member] | Sonex Health, Inc. [Member] | Term Loan, Prime Index, Three [Member]
Principal Amount	5,000,000		5,000,000
Investment, Unaffiliated Issuer [Member] | Medical Device Sector [Member] | Sonex Health, Inc. [Member] | Term Loan, Prime Index, Four [Member]
Principal Amount	5,000,000		5,000,000
Investment, Unaffiliated Issuer [Member] | Medical Device Sector [Member] | Sonex Health, Inc. [Member] | Term Loan, Prime Index, Five [Member]
Principal Amount	3,750,000		3,750,000
Investment, Unaffiliated Issuer [Member] | Medical Device Sector [Member] | Sonex Health, Inc. [Member] | Term Loan, Prime Index, Six [Member]
Principal Amount	3,750,000		3,750,000
Investment, Unaffiliated Issuer [Member] | Medical Device Sector [Member] | Sonex Health, Inc. [Member] | Term Loan, Prime Index, Seven [Member]
Principal Amount	3,750,000		3,750,000
Investment, Unaffiliated Issuer [Member] | Medical Device Sector [Member] | Sonex Health, Inc. [Member] | Term Loan, Prime Index, Eight [Member]
Principal Amount	3,750,000		3,750,000
Investment, Unaffiliated Issuer [Member] | Medical Device Sector [Member] | InfoBionic, Inc [Member] | Term Loan, Prime Index, One [Member]
Principal Amount	5,000,000		5,000,000
Investment, Unaffiliated Issuer [Member] | Medical Device Sector [Member] | InfoBionic, Inc [Member] | Term Loan, Prime Index, Two [Member]
Principal Amount	5,000,000		5,000,000
Investment, Unaffiliated Issuer [Member] | Medical Device Sector [Member] | InfoBionic, Inc [Member] | Term Loan, Prime Index, Three [Member]
Principal Amount	5,000,000		5,000,000
Investment, Unaffiliated Issuer [Member] | Medical Device Sector [Member] | InfoBionic, Inc [Member] | Preferred Stock Warrants [Member]
Investments at cost	231,000		231,000
Investments at fair value	$ 169,000		$ 175,000
Number of Shares (in shares)	5,361,130		5,361,130
Investment, Unaffiliated Issuer [Member] | Medical Device Sector [Member] | Pivot Bio, Inc. [Member] | Term Loan, Prime Index, Two [Member]
Principal Amount	$ 5,000,000
Investment, Unaffiliated Issuer [Member] | Medical Device Sector [Member] | Spineology, Inc [Member] | Term Loan, Prime Index, One [Member]
Principal Amount	5,000,000		$ 5,000,000
Investment, Unaffiliated Issuer [Member] | Medical Device Sector [Member] | Spineology, Inc [Member] | Term Loan, Prime Index, Two [Member]
Principal Amount	4,250,000		4,250,000
Investment, Unaffiliated Issuer [Member] | Medical Device Sector [Member] | Spineology, Inc [Member] | Term Loan, Prime Index, Three [Member]
Principal Amount	4,250,000		4,250,000
Investment, Unaffiliated Issuer [Member] | Medical Device Sector [Member] | Spineology, Inc [Member] | Term Loan, Prime Index, Four [Member]
Principal Amount	2,500,000		2,500,000
Investment, Unaffiliated Issuer [Member] | Medical Device Sector [Member] | MML US, Inc [Member] | Term Loan, Prime Index, One [Member]
Principal Amount	2,526,000
Investment, Unaffiliated Issuer [Member] | Medical Device Sector [Member] | MML US, Inc [Member] | Term Loan, Prime Index, Two [Member]
Principal Amount	2,526,000
Investment, Unaffiliated Issuer [Member] | Medical Device Sector [Member] | MML US, Inc [Member] | Term Loan, Prime Index, Three [Member]
Principal Amount	5,051,000
Investment, Unaffiliated Issuer [Member] | Medical Device Sector [Member] | MML US, Inc [Member] | Term Loan, Prime Index, Four [Member]
Principal Amount	5,051,000
Investment, Unaffiliated Issuer [Member] | Medical Device Sector [Member] | MML US, Inc [Member] | Term Loan, Prime Index, Five [Member]
Principal Amount	5,013,000
Investment, Unaffiliated Issuer [Member] | Medical Device Sector [Member] | MML US, Inc [Member] | Term Loan, Prime Index, Six [Member]
Principal Amount	5,013,000
Investment, Unaffiliated Issuer [Member] | Medical Device Sector [Member] | AccuVein Inc [Member] | Common Stock Warrants [Member]
Investments at cost			7,000
Investments at fair value			$ 0
Number of Shares (in shares)			271
Investment, Unaffiliated Issuer [Member] | Medical Device Sector [Member] | Aerin Medical, Inc [Member] | Preferred Stock Warrants [Member]
Investments at cost	65,000		$ 65,000
Investments at fair value	$ 1,349,000		$ 1,418,000
Number of Shares (in shares)	1,818,183		1,818,183
Investment, Unaffiliated Issuer [Member] | Medical Device Sector [Member] | Aerobiotix, LLC [Member] | Term Loan, Fixed Index One [Member]
Principal Amount			$ 2,500,000
Investment, Unaffiliated Issuer [Member] | Medical Device Sector [Member] | Aerobiotix, LLC [Member] | Term Loan, Fixed Index Two [Member]
Principal Amount			2,500,000
Investment, Unaffiliated Issuer [Member] | Medical Device Sector [Member] | Aerobiotix, LLC [Member] | Term Loan, Fixed Index Three [Member]
Principal Amount			200,000
Investment, Unaffiliated Issuer [Member] | Medical Device Sector [Member] | Aerobiotix, LLC [Member] | Preferred Stock Warrants [Member]
Investments at cost	$ 48,000		48,000
Investments at fair value	$ 0		$ 16,000
Number of Shares (in shares)	8,800		8,800
Investment, Unaffiliated Issuer [Member] | Medical Device Sector [Member] | Aerobiotix, LLC [Member] | Term Loan, Prime Index, One [Member]
Principal Amount	$ 2,500,000
Investment, Unaffiliated Issuer [Member] | Medical Device Sector [Member] | Aerobiotix, LLC [Member] | Term Loan, Prime Index, Two [Member]
Principal Amount	2,500,000
Investment, Unaffiliated Issuer [Member] | Medical Device Sector [Member] | Aerobiotix, LLC [Member] | Term Loan, Prime Index, Three [Member]
Principal Amount	200,000
Investment, Unaffiliated Issuer [Member] | Medical Device Sector [Member] | Canary Medical Inc. [Member] | Preferred Stock Warrants [Member]
Investments at cost	86,000		$ 86,000
Investments at fair value	$ 1,000		$ 2,000
Number of Shares (in shares)	12,153		12,153
Investment, Unaffiliated Issuer [Member] | Medical Device Sector [Member] | Cognoa, Inc. [Member] | Common Stock Warrants [Member]
Investments at cost	$ 0		$ 0
Investments at fair value	$ 2,000		$ 2,000
Number of Shares (in shares)	30,585		30,585
Investment, Unaffiliated Issuer [Member] | Medical Device Sector [Member] | Cognoa, Inc. [Member] | Preferred Stock Warrants [Member]
Investments at cost	$ 162,000		$ 162,000
Investments at fair value	$ 1,000		$ 1,000
Number of Shares (in shares)	4,635,991		4,635,991
Investment, Unaffiliated Issuer [Member] | Medical Device Sector [Member] | CSA Medical, Inc [Member] | Preferred Stock Warrants [Member]
Investments at cost	$ 174,000		$ 174,000
Investments at fair value	$ 468,000		$ 479,000
Number of Shares (in shares)	4,939,813		4,917,794
Investment, Unaffiliated Issuer [Member] | Medical Device Sector [Member] | CVRx, Inc [Member] | Common Stock Warrants [Member]
Investments at cost	$ 76,000		$ 76,000
Investments at fair value	$ 9,000		$ 160,000
Number of Shares (in shares)	47,410		47,410
Investment, Unaffiliated Issuer [Member] | Energy Efficiency [Member] | Pivot Bio, Inc. [Member] | Term Loan, Prime Index, One [Member]
Principal Amount	$ 5,000,000		$ 5,000,000
Investment, Unaffiliated Issuer [Member] | Energy Efficiency [Member] | Pivot Bio, Inc. [Member] | Term Loan, Prime Index, Two [Member]
Principal Amount			5,000,000
Investment, Unaffiliated Issuer [Member] | Alternative Energy Sector [Member] | Sparkcharge, Inc. [Member] | Term Loan, Prime Index, One [Member]
Principal Amount	2,500,000
Investment, Unaffiliated Issuer [Member] | Alternative Energy Sector [Member] | Sparkcharge, Inc. [Member] | Term Loan, Prime Index, Two [Member]
Principal Amount	2,500,000
Investment, Unaffiliated Issuer [Member] | Alternative Energy Sector [Member] | Sparkcharge, Inc. [Member] | Preferred Stock Warrants [Member]
Investments at cost	45,000
Investments at fair value	$ 36,000
Number of Shares (in shares)	2,264,151
Investment, Unaffiliated Issuer [Member] | Sustainability Segment [Member] | Debt Securities [Member]
Investments at cost	$ 36,850,000		67,637,000
Investments at fair value	28,843,000		67,052,000
Investment, Unaffiliated Issuer [Member] | Sustainability Segment [Member] | Warrant [Member]
Investments at cost	759,000		715,000
Investments at fair value	120,000		187,000
Investment, Unaffiliated Issuer [Member] | Sustainability Segment [Member] | Pivot Bio, Inc. [Member] | Preferred Stock Warrants [Member]
Investments at cost	14,000		14,000
Investments at fair value	$ 12,000		$ 14,000
Number of Shares (in shares)	210,418		210,418
Investment, Unaffiliated Issuer [Member] | Sustainability Segment [Member] | New Aerofarms, Inc. assignee of Aerofarms, Inc [Member] | Preferred Stock Warrants [Member]
Investments at cost	$ 81,000		$ 82,000
Investments at fair value	$ 12,000		$ 17,000
Number of Shares (in shares)	400,000		400,000
Investment, Unaffiliated Issuer [Member] | Sustainability Segment [Member] | Soli Organic, Inc [Member] | Common Stock Warrants [Member]
Investments at cost	$ 20,000		$ 20,000
Investments at fair value	$ 0		$ 19,000
Number of Shares (in shares)	296		296
Investment, Unaffiliated Issuer [Member] | Sustainability Segment [Member] | Soli Organic, Inc [Member] | Preferred Stock Warrants [Member]
Investments at cost	$ 382,000		$ 382,000
Investments at fair value	$ 0		$ 10,000
Number of Shares (in shares)	1,075		1,075
Investment, Unaffiliated Issuer [Member] | Sustainability Segment [Member] | LiquiGlide, Inc [Member] | Preferred Stock Warrants [Member]
Investments at cost	$ 39,000		$ 39,000
Investments at fair value	$ 23,000		$ 25,000
Number of Shares (in shares)	61,359		61,359
Investment, Unaffiliated Issuer [Member] | Sustainability Segment [Member] | Temperpack Technologies, Inc [Member] | Preferred Stock Warrants [Member]
Investments at cost	$ 178,000		$ 178,000
Investments at fair value	$ 37,000		$ 102,000
Number of Shares (in shares)	49,693		49,693
Investment, Unaffiliated Issuer [Member] | Other Healthcare Sector [Member] | GT Medical Technologies, Inc. [Member] | Term Loan, Prime Index, One [Member]
Principal Amount	$ 3,750,000		$ 3,750,000
Investment, Unaffiliated Issuer [Member] | Other Healthcare Sector [Member] | GT Medical Technologies, Inc. [Member] | Term Loan, Prime Index, Two [Member]
Principal Amount	3,750,000		3,750,000
Investment, Unaffiliated Issuer [Member] | Other Healthcare Sector [Member] | GT Medical Technologies, Inc. [Member] | Term Loan, Prime Index, Three [Member]
Principal Amount	7,500,000		7,500,000
Investment, Unaffiliated Issuer [Member] | Other Healthcare Sector [Member] | Hometeam Technologies, Inc [Member] | Term Loan, Prime Index, One [Member]
Principal Amount	5,000,000		5,000,000
Investment, Unaffiliated Issuer [Member] | Other Healthcare Sector [Member] | Hometeam Technologies, Inc [Member] | Term Loan, Prime Index, Two [Member]
Principal Amount	5,000,000		5,000,000
Investment, Unaffiliated Issuer [Member] | Other Healthcare Sector [Member] | Hometeam Technologies, Inc [Member] | Term Loan, Prime Index, Three [Member]
Principal Amount	5,000,000		5,000,000
Investment, Unaffiliated Issuer [Member] | Other Healthcare Sector [Member] | Hometeam Technologies, Inc [Member] | Term Loan, Prime Index, Four [Member]
Principal Amount	5,000,000		5,000,000
Investment, Unaffiliated Issuer [Member] | Other Healthcare Sector [Member] | Hometeam Technologies, Inc [Member] | Term Loan, Prime Index, Five [Member]
Principal Amount	5,000,000		5,000,000
Investment, Unaffiliated Issuer [Member] | Healthcare Information and Services Segment [Member] | Debt Securities [Member]
Investments at cost	107,818,000		106,940,000
Investments at fair value	100,516,000		104,189,000
Investment, Unaffiliated Issuer [Member] | Healthcare Information and Services Segment [Member] | Warrant [Member]
Investments at cost	990,000		1,047,000
Investments at fair value	3,136,000		1,066,000
Investment, Unaffiliated Issuer [Member] | Healthcare Information and Services Segment [Member] | BrightInsight, Inc. [Member] | Preferred Stock Warrants [Member]
Investments at cost	167,000		167,000
Investments at fair value	$ 0		$ 0
Number of Shares (in shares)	85,066		85,066
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Investments at cost	$ 164,000		$ 163,000
Investments at fair value	$ 144,000		$ 149,000
Number of Shares (in shares)	206,983		150,353
Investment, Unaffiliated Issuer [Member] | Healthcare Information and Services Segment [Member] | GT Medical Technologies, Inc. [Member] | Preferred Stock Warrants [Member]
Investments at cost	$ 83,000		$ 83,000
Investments at fair value	$ 92,000		$ 95,000
Number of Shares (in shares)	195,984		195,984
Investment, Unaffiliated Issuer [Member] | Healthcare Information and Services Segment [Member] | Hound Labs, Inc. [Member] | Preferred Stock Warrants [Member]
Investments at cost	$ 46,000		$ 45,000
Investments at fair value	$ 0		$ 0
Number of Shares (in shares)	451,796		451,796
Investment, Unaffiliated Issuer [Member] | Healthcare Information and Services Segment [Member] | Parse Biosciences, Inc. [Member] | Common Stock Warrants [Member]
Investments at cost	$ 71,000		$ 71,000
Investments at fair value	$ 43,000		$ 15,000
Number of Shares (in shares)	32,244		32,244
Investment, Unaffiliated Issuer [Member] | Healthcare Information and Services Segment [Member] | Parse Biosciences, Inc. [Member] | Preferred Stock Warrants [Member]
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Investments at fair value	$ 132,000		$ 15,000
Number of Shares (in shares)	184,253		184,253
Investment, Unaffiliated Issuer [Member] | Healthcare Information and Services Segment [Member] | Kate Farms, Inc [Member] | Preferred Stock Warrants [Member]
Investments at cost	$ 102,000		$ 101,000
Investments at fair value	$ 2,712,000		$ 700,000
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Investment, Unaffiliated Issuer [Member] | Healthcare Information and Services Segment [Member] | Elligo Healthcare Research, Inc. [Member] | Preferred Stock Warrants [Member]
Investments at cost	$ 191,000		$ 191,000
Investments at fair value	$ 13,000		$ 92,000
Number of Shares (in shares)	652,250		652,250
Investment, Unaffiliated Issuer [Member] | Healthcare Information and Services Segment [Member] | Medsphere Systems Corporation [Member] | Preferred Stock Warrants [Member]
Investments at cost			$ 60,000
Investments at fair value			$ 0
Number of Shares (in shares)			7,097,792
Investment, Unaffiliated Issuer [Member] | Networking Sector [Member] | Fictiv, Inc. [Member] | Term Loan, Prime Index, One [Member]
Principal Amount			$ 5,000,000
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Principal Amount			5,000,000
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Principal Amount	$ 1,929,000		1,607,000
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Principal Amount	1,607,000		1,607,000
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Principal Amount	1,607,000		3,214,000
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Principal Amount	964,000
Investment, Unaffiliated Issuer [Member] | Diagnostics Sector [Member] | Hound Labs, Inc. [Member] | Term Loan, Prime Index, Five [Member]
Principal Amount	3,214,000
Investment, Unaffiliated Issuer [Member] | Diagnostics Sector [Member] | Hound Labs, Inc. [Member] | Term Loan, Fixed Index One [Member]
Principal Amount	300,000
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Principal Amount	250,000
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Principal Amount	5,000,000		5,000,000
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Principal Amount	5,000,000
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Principal Amount			5,000,000
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Principal Amount			3,750,000
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Principal Amount			3,750,000
Investment, Affiliated Issuer, Noncontrolled [Member]
Investments at cost	27,493,000		27,491,000
Investments at fair value	6,707,000	8,307,000	8,307,000	15,847,000	12,577,000	1,132,000
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Investments at cost	5,000,000		5,000,000
Investments at fair value	0		0
Investment, Affiliated Issuer, Noncontrolled [Member] | Warrant [Member]
Investments at cost	127,000		127,000
Investments at fair value	0		0
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Investments at cost	22,366,000		22,364,000
Investments at fair value	6,707,000		8,307,000
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Investments at fair value	6,707,000	8,307,000	8,307,000	15,847,000	12,577,000	1,132,000
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Investment, Affiliated Issuer, Noncontrolled [Member] | Biotechnology Sector [Member] | Evelo Biosciences, Inc. [Member] | Other Investments, Prime Index, One [Member]
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Investments at fair value	6,707,000		1,825,000
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Investments at cost	5,000,000		5,000,000
Investments at fair value	$ 0		$ 0
Number of Shares (in shares)	2,164,502		2,164,502
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Investments at cost			$ 7,634,000
Investments at fair value			2,832,000
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Investments at cost			2,946,000
Investments at fair value			1,095,000
Investment, Affiliated Issuer, Noncontrolled [Member] | Biotechnology Sector [Member] | Evelo Biosciences, Inc. [Member] | Other Investments, Prime Index, Four [Member]
Investments at cost			2,946,000
Investments at fair value			1,095,000
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Investments at cost	$ 127,000		127,000
Investments at fair value	$ 0		$ 0
Number of Shares (in shares)	23,196		23,196
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Investments at cost			$ 1,964,000
Investments at fair value			730,000
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Investments at cost			1,964,000
Investments at fair value			730,000
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Investments at cost	$ 0		0
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Number of Shares (in shares)	660,537		660,537

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Reference 5: http://www.xbrl.org/2003/role/disclosureRef
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