CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($)	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit [Member]	Total
Balance at Dec. 31, 2019	$ 82,000	$ 65,102,000	$ (64,095,000)	$ 1,089,000
Balance (in shares) at Dec. 31, 2019	8,156
Net loss			(1,996,000)	(1,996,000)
Share-based compensation		588,000		588,000
Issuance of fully vested common shares		(24,000)		(24,000)
Issuance of fully vested common shares (in shares)	12
Issuance of common stock, and warrants to purchase common stock	$ 1,000	558,000		559,000
Issuance of common stock, and warrants to purchase common stock (in shares)	151
Issuance of common stock from exercise of warrants	$ 2,000	426,000		428,000
Issuance of common stock from exercise of warrants (in shares)	214
Balance at Mar. 31, 2020	$ 85,000	66,650,000	(66,091,000)	644,000
Balance (in shares) at Mar. 31, 2020	8,533
Balance at Dec. 31, 2020	$ 94,000	69,991,000	(68,960,000)	1,125,000
Balance (in shares) at Dec. 31, 2020	9,388
Net loss	$ 0	0	(874,000)	(874,000)
Share-based compensation	$ 0	130,000	0	130,000
Share-based compensation (in shares)	0
Balance at Mar. 31, 2021	$ 94,000	$ 70,121,000	$ (69,834,000)	$ 381,000
Balance (in shares) at Mar. 31, 2021	9,388