Share-Based Compensation - Option Roll-Forward (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Number of Shares
Outstanding balance (options), shares, beginning of period	3,652,200	4,150,550
Granted (options), shares	2,050,000
Exercised (options), shares	(50,000)
Forfeited and Expired (options), shares	(1,253,500)
Outstanding balance (options), shares, end of period	4,398,700	3,652,200
Number of options exercisable, shares	1,905,721
Weighted Average Exercise Price (usd per share)
Outstanding balance, weighted average exercise price per share, beginning of period (in usd per share)	$ 0.67
Granted, weighted average exercise price per share (in usd per share)	0.32
Options exercised in period, weighted average exercise price (in usd per share)	0.45
Forfeited and Expired, weighted average exercise price (in usd per share)	0.94
Outstanding balance weighted average exercise price per share, end of period (in usd per share)	0.43	$ 0.67
Exercisable, weighted average exercise price per share (in usd per share)	$ 0.53
Weighted average remaining contractual life, options outstanding	8 years 4 months 6 days
Weighted average remaining contractual life, options exercisable	7 years 4 months 24 days
Aggregate intrinsic value, options outstanding	$ 0
Aggregate intrinsic value, options exercisable	$ 0