Condensed Consolidated Statements of Stockholders' Equity (Deficit) (Unaudited) - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Total
Balance (in shares) at Dec. 31, 2017	38,218,660
Balance at Dec. 31, 2017	$ 38	$ 83,537	$ (72,450)	$ 11,125
Restricted stock units vested and issued (in shares)	20,444
Restricted stock units vested and issued
Share-based compensation		615		615
Net loss			(3,584)	(3,584)
Balance (in shares) at Mar. 31, 2018	38,241,244
Balance at Mar. 31, 2018	$ 38	84,157	(75,988)	8,207
Adjustments to opening balance for change in accounting principle			46	46
Exercise of stock options (in shares)	2,140
Exercise of stock options		5		5
Balance (in shares) at Dec. 31, 2018	43,611,240
Balance at Dec. 31, 2018	$ 43	90,110	(86,361)	3,792
Restricted stock units vested and issued (in shares)	20,444
Restricted stock units vested and issued	$ 1			1
Share-based compensation		690		690
Net loss			(3,665)	(3,665)
Balance (in shares) at Mar. 31, 2019	43,631,684
Balance at Mar. 31, 2019	$ 44	$ 90,800	$ (90,026)	$ 818
Exercise of stock options (in shares)