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Note 10 - Distributions - Distribution Activity (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended		9 Months Ended		12 Months Ended
	Oct. 28, 2022	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Distributions declared per share (in dollars per share)		$ 0.30	$ 0.30	$ 0.90	$ 0.90	$ 1.25
Dividends, cash				$ 17,083		$ 25,067
Dividends, shares (in shares)				32,590		28,057
Dividends, stock				$ 392		$ 460
Dividend Paid December 15, 2022 [Member]
Distributions declared per share (in dollars per share)	$ 0.05
Dividend Paid January 13, 2023 [Member]
Distributions declared per share (in dollars per share)	0.11
Dividend Paid February 15, 2023 [Member]
Distributions declared per share (in dollars per share)	0.11
First 7/29/2022 Dividend [Member]
Record date				Nov. 17, 2022
Payment date				Dec. 15, 2022
Distributions declared per share (in dollars per share)				$ 0.10
Dividends, cash				$ 0
Dividends, shares (in shares)				0
Dividends, stock				$ 0
Dividend Paid March 15, 2023 [Member]
Distributions declared per share (in dollars per share)	$ 0.11
Second 7/29/2022 Dividend [Member]
Record date				Oct. 18, 2022
Payment date				Nov. 15, 2022
Distributions declared per share (in dollars per share)				$ 0.10
Dividends, cash				$ 0
Dividends, shares (in shares)				0
Dividends, stock				$ 0
Third 7/29/2022 Dividend [Member]
Record date				Sep. 19, 2022
Payment date				Oct. 14, 2022
Distributions declared per share (in dollars per share)				$ 0.10
Dividends, cash				$ 2,558
Dividends, shares (in shares)				7,703
Dividends, stock				$ 81
First 4/29/22 Dividend [Member]
Record date				Aug. 18, 2022
Payment date				Sep. 15, 2022
Distributions declared per share (in dollars per share)				$ 0.10
Dividends, cash				$ 2,528
Dividends, shares (in shares)				4,925
Dividends, stock				$ 60
Second 4/29/2022 Dividend [Member]
Record date				Jul. 19, 2022
Payment date				Aug. 16, 2022
Distributions declared per share (in dollars per share)				$ 0.10
Dividends, cash				$ 2,484
Dividends, shares (in shares)				3,939
Dividends, stock				$ 55
Third 4/29/2022 Dividend [Member]
Record date				Jun. 17, 2022
Payment date				Jul. 15, 2022
Distributions declared per share (in dollars per share)				$ 0.10
Dividends, cash				$ 2,434
Dividends, shares (in shares)				4,286
Dividends, stock				$ 51
First 2/25/2022 Dividend [Member]
Record date				May 18, 2022
Payment date				Jun. 15, 2022
Distributions declared per share (in dollars per share)				$ 0.10
Dividends, cash				$ 2,378
Dividends, shares (in shares)				4,428
Dividends, stock				$ 50
Second 2/25/2022 Dividend [Member]
Record date				Apr. 19, 2022
Payment date				May 16, 2022
Distributions declared per share (in dollars per share)				$ 0.10
Dividends, cash				$ 2,349
Dividends, shares (in shares)				4,088
Dividends, stock				$ 49
Third 2/25/2022 Dividend [Member]
Record date				Mar. 18, 2022
Payment date				Apr. 14, 2022
Distributions declared per share (in dollars per share)				$ 0.10
Dividends, cash				$ 2,352
Dividends, shares (in shares)				3,221
Dividends, stock				$ 46
First 10/22/21 Dividend [Member]
Record date						Feb. 18, 2022
Payment date						Mar. 16, 2022
Distributions declared per share (in dollars per share)						$ 0.10
Dividends, cash						$ 2,100
Dividends, shares (in shares)						3,409
Dividends, stock						$ 46
Second 10/22/21 Dividend [Member]
Record date						Jan. 19, 2022
Payment date						Feb. 16, 2022
Distributions declared per share (in dollars per share)						$ 0.10
Dividends, cash						$ 2,096
Dividends, shares (in shares)						2,680
Dividends, stock						$ 43
Third 10/22/21 Dividend [Member]
Record date						Dec. 17, 2021
Payment date						Jan. 14, 2022
Distributions declared per share (in dollars per share)						$ 0.10
Dividends, cash						$ 2,031
Dividends, shares (in shares)						3,417
Dividends, stock						$ 56
Fourth 10/22/21 Dividend [Member]
Record date						Nov. 18, 2021
Payment date						Dec. 15, 2021
Distributions declared per share (in dollars per share)						$ 0.05
Dividends, cash						$ 1,013
Dividends, shares (in shares)						1,197
Dividends, stock						$ 20
First 7/23/21 Dividend [Member]
Record date						Nov. 18, 2021
Payment date						Dec. 15, 2021
Distributions declared per share (in dollars per share)						$ 0.10
Dividends, cash						$ 2,027
Dividends, shares (in shares)						2,395
Dividends, stock						$ 38
Second 7/23/21 Dividend [Member]
Record date						Oct. 19, 2021
Payment date						Nov. 16, 2021
Distributions declared per share (in dollars per share)						$ 0.10
Dividends, cash						$ 2,010
Dividends, shares (in shares)						1,907
Dividends, stock						$ 34
Third 7/23/21 Dividend [Member]
Record date						Sep. 17, 2021
Payment date						Oct. 15, 2021
Distributions declared per share (in dollars per share)						$ 0.10
Dividends, cash						$ 2,008
Dividends, shares (in shares)						2,068
Dividends, stock						$ 36
First 4/23/21 Dividend [Member]
Record date						Aug. 18, 2021
Payment date						Sep. 15, 2021
Distributions declared per share (in dollars per share)						$ 0.10
Dividends, cash						$ 1,996
Dividends, shares (in shares)						2,041
Dividends, stock						$ 34
Second 4/23/21 Dividend [Member]
Record date						Jul. 20, 2021
Payment date						Aug. 16, 2021
Distributions declared per share (in dollars per share)						$ 0.10
Dividends, cash						$ 1,983
Dividends, shares (in shares)						1,937
Dividends, stock						$ 34
Third 4/23/21 Dividend [Member]
Record date						Jun. 17, 2021
Payment date						Jul. 16, 2021
Distributions declared per share (in dollars per share)						$ 0.10
Dividends, cash						$ 1,964
Dividends, shares (in shares)						1,888
Dividends, stock						$ 33
First 2/26/21 Dividend [Member]
Record date						May 18, 2021
Payment date						Jun. 16, 2021
Distributions declared per share (in dollars per share)						$ 0.10
Dividends, cash						$ 1,964
Dividends, shares (in shares)						1,671
Dividends, stock						$ 29
Second 2/26/21 Dividend [Member]
Record date						Apr. 20, 2021
Payment date						May 14, 2021
Distributions declared per share (in dollars per share)						$ 0.10
Dividends, cash						$ 1,937
Dividends, shares (in shares)						1,794
Dividends, stock						$ 29
Third 2/26/21 Dividend [Member]
Record date						Mar. 18, 2021
Payment date						Apr. 16, 2021
Distributions declared per share (in dollars per share)						$ 0.10
Dividends, cash						$ 1,938
Dividends, shares (in shares)						1,653
Dividends, stock						$ 28

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