CONSOLIDATED CONDENSED BALANCE SHEETS (UNAUDITED) - USD ($)	Mar. 31, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 14,447,000	$ 8,346,000
Other current assets	999,000	829,000
Total current assets	15,446,000	9,175,000
Property and equipment, net	1,825,000	1,820,000
Operating lease right-of-use assets	600,000	636,000
Goodwill	372,000	372,000
Intangible assets, net	77,000	86,000
Other assets	16,000	16,000
Total assets	18,336,000	12,105,000
Current liabilities:
Accounts payable and accrued expenses	1,716,000	2,081,000
Operating lease liability	113,000	123,000
Term loan obligations, net of discount	6,486,000	6,335,000
Total current liabilities	8,315,000	8,539,000
Noncurrent operating lease liability	503,000	528,000
Warrant liability	5,000	7,000
Total liabilities	8,823,000	9,074,000
Commitments and contingencies (Note 7)
Stockholders’ equity:
Preferred stock, $0.001 par value; 5,000,000 shares authorized; 1,952 and 1,954 shares issued and outstanding at March 31, 2021 and December 31, 2020, respectively
Common stock, $0.001 par value; 100,000,000 shares authorized; 10,180,525 and 6,749,028 shares issued and outstanding at March 31, 2021 and December 31, 2020, respectively	10,000	7,000
Additional paid-in capital	445,734,000	436,535,000
Accumulated deficit	(436,231,000)	(433,511,000)
Total stockholders’ equity	9,513,000	3,031,000
Total liabilities and stockholders’ equity	$ 18,336,000	$ 12,105,000

Sum of the carrying values as of the balance sheet date of obligations incurred through that date and due within one year (or the operating cycle, if longer), including liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received, taxes, interest, rent and utilities, accrued salaries and bonuses, payroll taxes and fringe benefits.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Excess of issue price over par or stated value of the entity's capital stock and amounts received from other transactions involving the entity's stock or stockholders. Includes adjustments to additional paid in capital. Some examples of such adjustments include recording the issuance of debt with a beneficial conversion feature and certain tax consequences of equity instruments awarded to employees. Use this element for the aggregate amount of additional paid-in capital associated with common and preferred stock. For additional paid-in capital associated with only common stock, use the element additional paid in capital, common stock. For additional paid-in capital associated with only preferred stock, use the element additional paid in capital, preferred stock.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 65
-Paragraph 15
-Subparagraph (g)(2)
-URI http://asc.fasb.org/extlink&oid=121322162&loc=SL121327923-165333

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(30)(a)(1))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682