Stock-based Compensation (Tables)
 12 Months Ended
Dec. 31, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Summary of Restricted Stock Unit Awards Activity
The following table summarizes the Company’s restricted stock unit awards activity during the year ended December 31, 2014:

 
Restricted Stock
Award Units
 
Weighted-Average
Grant Date 
Fair Value
Outstanding unvested at December 31, 2011
—

 
$
—

Granted
389,057

 
7.77

Vested restricted stock units
(214,933
)
 
7.80

Forfeited
(15,567
)
 
7.83

Outstanding unvested at December 31, 2012
158,557

 
7.73

Granted
45,914

 
21.43

Vested restricted stock units
(88,610
)
 
10.68

Forfeited
(24,643
)
 
7.75

Outstanding unvested at December 31, 2013
91,218

 
11.75

Granted
35,752

 
16.68

Vested restricted stock units
(50,695
)
 
12.81

Forfeited
(20,672
)
 
12.74

Outstanding unvested at December 31, 2014
55,603

 
$
13.59
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block]
The Company recognized stock-based compensation expense during the years ended December 31, 2014, 2013, and 2012 as follows (in thousands):

 
Year Ended December 31,

2014
 
2013
 
2012
Stock-based compensation expense:
 
 
 
 
 
Cost of revenues
$
69

 
$
70

 
$
378

Operating expenses
792

 
722

 
1,740

Total
$
861

 
$
792

 
$
2,118
Schedule of Unrecognized Stock-Based Compensation Expense Related to Outstanding Unvested Restricted Stock Unit Awards Expected to be Recognized
Unrecognized stock-based compensation expense related to outstanding unvested restricted stock unit awards as of December 31, 2014 is expected to be recognized over a weighted average period of 0.6 years, as follows (in thousands):
 
 
Unamortized
Compensation
Expense
2015
$
445

2016
91

Thereafter
7

Total
$
543