Consolidated Statement of Changes in Stockholders' Equity (Unaudited) - 6 months ended Jun. 30, 2018 - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-In Capital [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Accumulated Deficit [Member]	Total
Balance at Dec. 31, 2017	$ 33	$ 317,419	$ 11	$ (308,760)	$ 8,703
Balance, shares at Dec. 31, 2017	32,884,786
Equity-based compensation	$ 1	611			612
Equity-based compensation, shares	1,040,157
Warrants issued for building sale leaseback		1,149			1,149
Redeemable warrants		221			221
Common stock issuance, net of costs	$ 12	3,267			3,279
Common stock issuance, net of costs, shares	12,247,113
Common stock issued to settle accounts payable	$ 1	279			280
Common stock issued to settle accounts payable, shares	645,909
Net comprehensive loss			(20)	(5,128)	(5,148)
Balance at Jun. 30, 2018	$ 47	$ 322,946	$ (9)	$ (313,888)	$ 9,096
Balance, shares at Jun. 30, 2018	46,817,965