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Stockholders' Equity (Tables)
 12 Months Ended
Dec. 31, 2015
Share-based Compensation [Abstract]  
Schedule of weighted-average assumptions used to value options as of their grant date
The weighted-average assumptions used to value options as of their grant date were as follows:
 
Year Ended
December 31,
 
2015
 
2014
 
2013
Risk-free interest rate
1.55
%
 
1.52
%
 
1.06
%
Expected volatility
43.3
%
 
46.5
%
 
50.9
%
Expected life (in years)
4.17

 
4.21

 
4.24

Dividend yield
0
%
 
0
%
 
0
%
Schedule of share-based compensation, stock options, activity
The changes in outstanding stock options for the year ended December 31, 2015 are as follows:
 
 
Number of Options
 
Weighted Average
Exercise Price
 
Weighted Average
Remaining
Contractual Life
(in Years)
 
Aggregate Intrinsic
Value
Outstanding at December 31, 2014
1,205

 
$
11.65

 
 
 
 
Granted
120

 
$
12.04

 
 
 
 
Exercised
(10
)
 
$
8.64

 
 
 
 
Expired, canceled or forfeited
(138
)
 
$
12.59

 
 
 
 
Outstanding at December 31, 2015
1,177

 
$
11.60

 
2.04
 
$
123

Exercisable at December 31, 2015
687

 
$
11.60

 
2.00
 
$
122

Options vested or expected to vest at December 31, 2015
1,154

 
$
11.58

 
1.25
 
$
111
Schedule of share-based compensation, activity
Restricted stock activity under the Amended and Restated 2006 Stock Incentive Plan for 2015 is as follows:
 
 
Number of
Shares
 
Weighted-
average
grant date
fair value
Outstanding at December 31, 2014, unvested
427

 
$
13.67

Granted
203

 
12.43

Vested
(171
)
 
13.44

Forfeited
(2
)
 
10.68

Outstanding at December 31, 2015, unvested
458

 
$
13.22