CONSOLIDATED STATEMENT OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands	Total	Preferred Stock	Common Stock	Additional Paid-In Capital	Accumulated Deficit
Beginning balance (in shares) at Dec. 31, 2016		976	30,860
Beginning balance, amount at Dec. 31, 2016	$ 26,223	$ 1	$ 31	$ 49,625	$ (23,434)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock based compensation	341			341
Net loss available to common shareholders	(2,993)				(2,993)
Ending balance, amount at Jun. 30, 2017	23,571	$ 1	$ 31	49,966	(26,427)
Ending balance (in shares) at Jun. 30, 2017		976	30,860
Beginning balance (in shares) at Dec. 31, 2017		0	32,878
Beginning balance, amount at Dec. 31, 2017	22,032	$ 0	$ 33	50,495	(28,496)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Options exercised (in shares)			37
Options exercised	83			83
Warrant exercised (in shares)			40
Warrants exercised	95			95
Stock based compensation	749			749
Stock swap to acquire options and warrants (in shares)			(42)
Stock swap to acquire options and warrants	(178)			(178)
Net loss available to common shareholders	(1,207)				(1,207)
Ending balance, amount at Jun. 30, 2018	$ 21,574	$ 0	$ 33	$ 51,244	$ (29,703)
Ending balance (in shares) at Jun. 30, 2018		0	32,913