Condensed Consolidated Statements of Stockholders' (Deficit) Equity (Unaudited) - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Total
Balance (in shares) at Dec. 31, 2017	4,246,519
Balance at Dec. 31, 2017	$ 38	$ 83,537	$ (72,450)	$ 11,125
Restricted stock units vested and issued (in shares)	2,271
Restricted stock units vested and issued
Share-based compensation		615		615
Net loss			(3,584)	(3,584)
Balance (in shares) at Mar. 31, 2018	4,249,027
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)	237
Exercise of stock options		5		5
Balance (in shares) at Dec. 31, 2017	4,246,519
Balance at Dec. 31, 2017	$ 38	83,537	(72,450)	11,125
Net loss				(6,801)
Balance (in shares) at Jun. 30, 2018	4,253,100
Balance at Jun. 30, 2018	$ 38	84,895	(79,175)	5,758
Balance (in shares) at Mar. 31, 2018	4,249,027
Balance at Mar. 31, 2018	$ 38	84,157	(75,988)	8,207
Restricted stock units vested and issued (in shares)	4,073
Restricted stock units vested and issued
Share-based compensation		738		738
Net loss			(3,217)	(3,217)
Balance (in shares) at Jun. 30, 2018	4,253,100
Balance at Jun. 30, 2018	$ 38	84,895	(79,175)	5,758
Adjustments to opening balance for change in accounting principle			30	30
Balance (in shares) at Dec. 31, 2018	4,845,697
Balance at Dec. 31, 2018	$ 43	90,110	(86,361)	3,792
Restricted stock units vested and issued (in shares)	2,268
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	4,847,965
Balance at Mar. 31, 2019	$ 44	90,800	(90,026)	818
Balance (in shares) at Dec. 31, 2018	4,845,697
Balance at Dec. 31, 2018	$ 43	90,110	(86,361)	3,792
Net loss				(7,415)
Balance (in shares) at Jun. 30, 2019	4,847,471
Balance at Jun. 30, 2019	$ 44	91,496	(93,776)	$ (2,236)
Exercise of stock options (in shares)
Balance (in shares) at Mar. 31, 2019	4,847,965
Balance at Mar. 31, 2019	$ 44	90,800	(90,026)	$ 818
Share-based compensation		696		696
Net loss			(3,750)	(3,750)
Balance (in shares) at Jun. 30, 2019	4,847,471
Balance at Jun. 30, 2019	$ 44	$ 91,496	$ (93,776)	$ (2,236)
Reverse stock split fractional share true up (in shares)	(494)