CONSOLIDATED STATEMENT OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Retained Earnings (Accumulated deficit)
Beginning balance (in shares) at Dec. 31, 2017		32,878,000
Beginning balance, amount at Dec. 31, 2017	$ 22,032	$ 33	$ 50,495	$ (28,496)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock based compensation	372		372
Net loss	(935)			(935)
Ending balance (in shares) at Mar. 31, 2018		32,878,000
Ending balance, amount at Mar. 31, 2018	21,469	$ 33	50,867	(29,431)
Beginning balance (in shares) at Dec. 31, 2018		33,705
Beginning balance, amount at Dec. 31, 2018	87,768	$ 34	52,221	35,513
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Options exercised (in shares)		271
Options exercised	777	$ 0	777	0
Stock based compensation	859		859
Stock exercise to acquire options and warrants (in shares)		(85,000)
Stock exercise to acquire options and warrants	(710)		(710)
Net loss	(4,681)			(4,681)
Ending balance (in shares) at Mar. 31, 2019		33,891,000
Ending balance, amount at Mar. 31, 2019	$ 84,013	$ 34	$ 53,147	$ 30,832