Share-Based Compensation Option Roll-Forward (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Stock Option Activity [Roll Forward]
Outstanding balance (options) at December 31, 2014		3,652,200
Options granted (in shares)		1,050,000
Exercised (options)	(16,500)	(50,000)	(54,000)
Expired (options)		(413,000)
Forfeited (options)		(3,000)
Outstanding balance (options) at June 30, 2015		4,236,200.0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Outstanding balance (weighted average exercise price) at December 31, 2014		$ 0.67
Granted (weighted average exercise price)		0.47
Exercised (weighted averaged exercise price)	$ 0.65	0.45	$ 0.51
Expired (weighted average exercise price)		1.44
Forfeited (weighted average exercise price)		0.67
Outstanding balance (weighted average exercise price) at June 30, 2015		$ 0.55
Weighted Average Remaining Contractual Life, options outstanding		8 years 117 days
Aggregate Intrinsic Value (in thousands), options outstanding		$ 0
Number of options exercisable at June 30, 2015		1,637,291
Weighted average exercise price of options exercisable at June 30, 2015		$ 0.64
Weighted Average Remaining Contractual Life, options exercisable		7 years 172 days
Aggregate Intrinsic Value (in thousands), options exercisable		$ 0