Consolidated Statements of Changes in Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Total
Balance (in shares) at Dec. 31, 2018	14,712
Balance at Dec. 31, 2018	$ 294	$ 17,285	$ (3,935)	$ 13,644
Net income			170	170
Restricted stock forfeited or expired (in shares)	(182)
Restricted stock forfeited or expired
Stock-based compensation (in shares)	417
Stock-based compensation		85		85
Balance (in shares) at Dec. 31, 2019	14,947
Balance at Dec. 31, 2019	$ 294	17,370	(3,765)	13,899
Net income			63	63
Stock-based compensation (in shares)
Stock-based compensation		83		83
Issuance of common stock (in shares)	19,500
Issuance of common stock	$ 390	12,285		12,675
Options forfeited or expired (in shares)	(42)
Balance (in shares) at Dec. 31, 2020	34,405
Balance at Dec. 31, 2020	$ 684	$ 29,738	$ (3,702)	$ 26,720