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Share-Based Payments (Tables)
 12 Months Ended
Dec. 31, 2013
Shareholders' Equity and Share-based Payments [Abstract]  
Share-based Compensation - Black-Scholes assumptions
In applying the Black-Scholes methodology to the options granted, the Company used the following assumptions:
 
Year ended December 31,
 
2013
 
2012
Risk-free interest rate, average
1.8%
 
1.3%
Expected option life, average
6.8 years
 
7.2 years
Expected price volatility, average
49.8%
 
51.4%
Expected dividend yield
—%
 
—%
Schedule of Share-based Compensation, Stock Options, Activity
The following table shows the stock option activity:
 
Number of Shares
 
Weighted Average Exercise Price
 
Weighted Average Remaining Contractual Term (Years)
 
Aggregate Intrinsic Value
As of December 31, 2012
1,137,283

 
$
4.63

 
 
 
 
Granted
127,500

 
8.52

 
 
 
 
Expired and canceled
(4,323
)
 
4.03

 
 
 
 
Forfeited prior to vesting
(26,536
)
 
4.73

 
 
 
 
Exercised
(122,650
)
 
3.99

 
 
 
 
As of December 31, 2013
1,111,274

 
$
5.15

 
4.86
 
$
4,016

Vested and Expected to Vest at December 31, 2013
1,111,274

 
$
5.15

 
4.86
 
$
4,016

Vested at December 31, 2013
850,159

 
$
4.76

 
3.62
 
$
3,395