CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY - USD ($) $ in Thousands	Common Stock	Additional Paid-in Capital	Accumulated Deficit	Accumulated Other Comprehensive income (loss)	Total
Balance at Dec. 31, 2015	$ 534	$ 484,742	$ (477,378)	$ (127)	$ 7,771
Balance (in shares) at Dec. 31, 2015	53,335,333
Increase (Decrease) in Stockholders' Equity
Stock compensation accrued and shares issued for vested stock awards	$ 2	250			252
Stock compensation accrued and shares issued for vested stock awards (in shares)	317,968
Shares issued on conversion of Sentient Note	$ 273	6,944			7,217
Shares issued on conversion of Sentient Note (in shares)	27,366,740
Common stock, new issue	$ 80	3,519			3,599
Common stock, new issue (in shares)	8,000,000
Unrealized (loss) gain on securities				182	182
Net loss			(10,659)		(10,659)
Balance at Dec. 31, 2016	$ 889	495,455	(488,037)	55	8,362
Balance (in shares) at Dec. 31, 2016	89,020,041
Increase (Decrease) in Stockholders' Equity
Stock compensation accrued and shares issued for vested stock awards		75			75
Common stock, new issue	$ 10	664			674
Common stock, new issue (in shares)	1,011,306
Unrealized (loss) gain on securities				(103)	(103)
Net loss			(1,170)		(1,170)
Balance at Jun. 30, 2017	$ 899	$ 496,194	$ (489,207)	$ (48)	$ 7,838
Balance (in shares) at Jun. 30, 2017	90,031,347