CONDENSED CONSOLIDATED STATEMENT OF CHANGES IN EQUITY (Unaudited) - 3 months ended Mar. 31, 2018 - USD ($) $ in Thousands	Preferred Stock [Member] Convertible Preferred Stock [Member]	Common Stock [Member]	Additional Paid-In Capital [Member]	Accumulated Deficit [Member]	Accumulated Deficit [Member] Effect of Adoption Higher / (Lower) [Member]	Total
Beginning balance at Dec. 31, 2017	$ 4	$ 4	$ 251,643	$ (229,406)		$ 22,245
Beginning balance (ASU 2014-09 [Member]) at Dec. 31, 2017	$ 4	$ 4	251,643	(229,640)		22,011
Beginning balance (in shares) at Dec. 31, 2017	36,182	4,304,425
Beginning balance (in shares) (ASU 2014-09 [Member]) at Dec. 31, 2017	36,182	4,304,425
Adoption of accounting standard (ASU 2014-09 [Member]) at Dec. 31, 2017	$ 0	$ 0	0		$ (234)	(234)
Stock-based compensation	0	0	19	0		19
Conversion of convertible preferred stock into common stock	$ 0	$ 0	0	0		0
Conversion of convertible preferred stock into common stock (in shares)	(202)	75,000
Net loss	$ 0	$ 0	0	(2,223)		(2,223)
Ending balance at Mar. 31, 2018	$ 4	$ 4	$ 251,662	$ (231,863)		$ 19,807
Ending balance (in shares) at Mar. 31, 2018	35,980	4,379,425