Stock-Based Compensation - Stock Option Activity (Details) - Stock options - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Number of Options Outstanding
Options granted	182,500
Options exercised	32,227
Options forfeited	70,000
Options expired	0
Outstanding, Exercisable	1,198,204	945,012
Weighted Average Exercise Price
Beginning balance (in dollars per share)	$ 1.84
Options granted (in dollars per share)	1.47
Options exercised (in dollars per share)	2.09
Options forfeited (in dollars per share)	2.61
Options expired (in dollars per share)	0.00
Ending balance (in dollars per share)	1.63	$ 1.84
Weighted Average Exercise Price, Exercisable (in dollars per share)	$ 1.63	$ 1.66
Average Remaining Contractual Life (in years)	7 years 1 month 17 days
Average Remaining Contractual Life, Exercisable (in years)	6 years 8 months 23 days	9 years 4 months 17 days
Aggregate Intrinsic Value, Outstanding	$ 0
Aggregate Intrinsic Value, Exercisable	$ 0	$ 974