UNAUDITED CONDENSED CONSOLIDATED STATEMENT OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in- Capital	Accumulated Deficit
Beginning balance (in shares) at Dec. 31, 2017		39,300,823
Beginning balance at Dec. 31, 2017	$ 19,975	$ 4	$ 53,586	$ (33,615)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of options (in shares)		8,532
Exercise of options	7		7
Equity-based compensation	365		365
Issuance of common stock, net (in shares)		145,466
Issuance of common stock, net	436		436
Net loss	(5,509)			(5,509)
Ending balance (in shares) at Mar. 31, 2018		39,454,821
Ending balance at Mar. 31, 2018	16,308	$ 4	54,394	(38,090)
Beginning balance (in shares) at Dec. 31, 2018		44,358,000
Beginning balance at Dec. 31, 2018	$ 20,952	$ 4	75,942	(54,994)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of options (in shares)	0
Equity-based compensation	$ 489		489
Net loss	(5,286)			(5,286)
Ending balance (in shares) at Mar. 31, 2019		44,358,000
Ending balance at Mar. 31, 2019	$ 16,155	$ 4	$ 76,431	$ (60,280)