Stock-Based Compensation (Details) $ / shares in Units, $ in Thousands		3 Months Ended		12 Months Ended
	Jan. 22, 2016 $ / shares shares	Mar. 31, 2016 USD ($) $ / shares shares	Mar. 31, 2015 USD ($) $ / shares shares	Dec. 31, 2015 USD ($) $ / shares shares	Dec. 31, 2014 $ / shares shares
Stock-based compensation expense | $		$ 1,454	$ 590
Common Stock, Shares, Issued		46,942,735		46,817,829
Common Stock, Shares, Outstanding		46,942,735		46,817,829
Common Stock
Authorized Common Stock		100,000,000		100,000,000
Par Value per share | $ / shares		$ 0.00001		$ 0.00001
Options
Exercised - in shares		2.78
Expired (in shares)				(86,000)
Forfeited (in shares)				11.30
Weighted-Average Exercise Price
Outstanding at the beginning of the period (in dollars per share) | $ / shares			$ 6.94	$ 6.94
Exercised (in dollars per share) | $ / shares		$ 2.78
Expired (in dollars per share) | $ / shares				11.30
Outstanding at the end of the period ( in dollars per share) | $ / shares		$ 7.04		$ 6.94
Outstanding at the end of the period (in dollars per share) | $ / shares					$ 6.94
Weighted- Average Remaining Contractual Life (in years)		3 years 2 months 19 days		3 years 5 months 19 days
Aggregate Intrinsic Value
Aggregate Intrinsic Value | $		$ 1,400		$ 1,300
Summary of the RSU activity
Exercised - in shares		2.78
Forfeited				86,000
Weighted Average Grant Date Fair Value
Unvested outstanding as of beginning of period | $ / shares		$ 6.94
Outstanding at the end of the period ( in dollars per share) | $ / shares		$ 7.04		$ 6.94
Restricted stock units (RSUs)
Vesting Period		3 years
Fair Value | $ / shares	$ 10.77	$ 10.77
Recognition period of unrecognized compensation cost		2 years 1 month 28 days
Unrecognized Compensation Expense | $		$ 5,000
Options
Outstanding at the beginning of the Period (in shares)		827,383
Granted (in shares)		406,586
Outstanding at the end of the Period (in shares)		1,031,538		827,383
Weighted-Average Exercise Price
Outstanding at the end of the period ( in dollars per share) | $ / shares		$ 6.43		$ 4.09
Weighted- Average Remaining Contractual Life (in years)		2 years 1 month 28 days		2 years 1 month 13 days
Aggregate Intrinsic Value
Aggregate fair value | $		$ 6,600		$ 3,400
Summary of the RSU activity
Outstanding at the beginning of the Period (in shares)		827,383
Granted (in shares)		406,586
Vested		(202,431)
Outstanding at the end of the Period (in shares)		1,031,538		827,383
Weighted Average Grant Date Fair Value
Unvested outstanding as of beginning of period | $ / shares		$ 4.09
Granted | $ / shares	$ 10.77	10.77
Vested | $ / shares		5.56
Outstanding at the end of the period ( in dollars per share) | $ / shares		$ 6.43		$ 4.09
RSU And Performance Awards
Stock-based compensation expense | $		$ 1,500	$ 600
Stock options.
Vesting Period		3 years
Performance Awards
Percentage of target to be achieved to be eligible to receive performance awards		100		135
Options
Outstanding at the beginning of the Period (in shares)		475,409
Outstanding at the end of the Period (in shares)		178,172		475,409
Summary of the RSU activity
Outstanding at the beginning of the Period (in shares)		475,409
Outstanding at the end of the Period (in shares)		178,172		475,409
Time-based Awards
Percentage of target to be achieved to be eligible to receive time based awards		100.00%		100.00%
Options
Granted (in shares)		228,414
Summary of the RSU activity
Granted (in shares)		228,414
Outstanding as of beginning
Range of Exercise Price
Lower end of exercise price | $ / shares					2.44
Upper end of exercise price | $ / shares					$ 16.27
Granted
Options
Outstanding at the beginning of the Period (in shares)			398,200	398,200
Outstanding at the end of the Period (in shares)					398,200
Summary of the RSU activity
Outstanding at the beginning of the Period (in shares)			398,200	398,200
Outstanding at the end of the Period (in shares)					398,200
Expired
Options
Outstanding at the beginning of the Period (in shares)		312,200
Outstanding at the end of the Period (in shares)				312,200
Summary of the RSU activity
Outstanding at the beginning of the Period (in shares)		312,200
Outstanding at the end of the Period (in shares)				312,200
Forfeited
Options
Exercised - in shares		(7,747)
Summary of the RSU activity
Exercised - in shares		(7,747)
Outstanding as of the end
Options
Outstanding at the end of the Period (in shares)		304,453
Range of Exercise Price
Lower end of exercise price | $ / shares		$ 2.44		$ 2.44
Upper end of exercise price | $ / shares		$ 16.27		$ 16.27
Summary of the RSU activity
Outstanding at the end of the Period (in shares)		304,453
Ex Executive Officer
Severance Costs | $		$ 1,400
Ex Executive Officer | Restricted stock units (RSUs)
Stock-based compensation expense | $		$ 500
Summary of the RSU activity
Vested		(167,511)
Minimum
Performance Awards
Performance Period		1 year
Minimum | Plan 2015 Member
Payout range as a percent of award target		0.00%
Minimum | Performance Awards
Vesting Period		1 year
Maximum
Performance Awards
Performance Period		2 years
Maximum | Plan 2015 Member
Payout range as a percent of award target		200.00%
Maximum | Performance Awards
Vesting Period		2 years
Executive Officer [Member] | Restricted stock units (RSUs)
Granted (in shares)	367,519
Non Employee Board Member | Restricted stock units (RSUs)
Granted (in shares)	34,920	4,147