Condensed Consolidated Statement of Changes in Shareholders' Equity (unaudited) - 3 months ended Mar. 31, 2018 - USD ($) $ in Thousands	Class A Common Stock	Additional Paid - in Capital	Accumulated Deficit	Total
Balances at Dec. 31, 2017	$ 8	$ 206,640	$ (200,482)	$ 6,166
Balance (in shares) at Dec. 31, 2017	8,151,845
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Proceeds from common stock offering and warrant exercises, net of costs		1,524		1,524
Proceeds from common stock offering and warrant exercises, net of costs (in shares)	1,600,000
Common stock issued to settle proxy contest (in shares)	600,000
Net Loss			(4,338)	(4,338)
Balances at Mar. 31, 2018	$ 8	$ 208,164	$ (204,820)	$ 3,352
Balance (in shares) at Mar. 31, 2018	10,351,845