Share-Based Compensation - Option Roll-Forward (Details) $ / shares in Units, $ in Thousands	6 Months Ended
	Jun. 30, 2016 USD ($) $ / shares shares	Jun. 30, 2015 $ / shares shares
Stock Option Activity [Roll Forward]
Outstanding balance at December 31, 2015 (in shares) | shares	286,568
Options granted (in shares) | shares	153,332
Options exercised (in shares) | shares	0	(50,000)
Options forfeited and expired (in shares) | shares	(34,560)
Outstanding balance at June 30, 2016 (in shares) | shares	405,340.00
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, 2015 (in dollars per share) | $ / shares	$ 6.46
Granted (weighted average exercise price) (in dollars per share) | $ / shares	2.05
Exercised (weighted averaged exercise price) (in dollars per share) | $ / shares	0.00	$ 0.45
Forfeited and Expired (weighted average exercise price) (in dollars per share) | $ / shares	3.23
Outstanding balance (weighted average exercise price) at June 30, 2016 (in dollars per share) | $ / shares	$ 5.07
Weighted Average Remaining Contractual Life, options outstanding	8 years 5 months 12 days
Aggregate Intrinsic Value of options | $	$ 0
Number of options exercisable at March 31, 2016 (in shares) | shares	147,113
Weighted average exercise price of options exercisable at March 31, 2016 (in dollars per share) | $ / shares	$ 7.65
Weighted Average Remaining Contractual Life, options exercisable	7 years 2 months 29 days
Aggregate Intrinsic Value of options | $	$ 0