Consolidated Statement of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]
Balance at Dec. 31, 2018	$ 7,604	$ 1	$ 61,628	$ (54,025)
Balance (in shares) at Dec. 31, 2018		72,732,292
Common stock issued for services	55		55
Common stock issued for services (in shares)		322,162
Common stock issued for stock options exercised	$ 7		7
Common stock issued for stock options exercised (in shares)	71,084	71,084
Stock based compensation	$ 769		769
Net loss	(5,153)			(5,153)
Balance at Dec. 31, 2019	3,282	$ 1	62,459	(59,178)
Balance (in shares) at Dec. 31, 2019		73,125,538
Common stock issued for services	76		76
Common stock issued for services (in shares)		545,057
Shares issued in exchange for warrants (in shares)		27,499,985
Common stock issued for cash	5,425		5,425
Common stock issued for cash (in shares)		11,500,000
Offering costs netted against proceeds from common stock issued for cash	(109)		(109)
Stock based compensation	347		347
Net loss	(4,386)			(4,386)
Balance at Dec. 31, 2020	$ 4,635	$ 1	$ 68,198	$ (63,564)
Balance (in shares) at Dec. 31, 2020		112,670,580