Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity and Stock Based Compensation (Details)

v2.4.0.6
Stockholders' Equity and Stock Based Compensation (Details)
3 Months Ended 12 Months Ended
Mar. 31, 2013
Installment
Dec. 31, 2012
Installment
Dec. 31, 2011
Customer
Dec. 31, 2010
Installment
Dec. 31, 2009
Installment
Dec. 31, 2008
Installment
Dec. 31, 2007
Installment
Dec. 31, 2006
Installment
2006 Plan
               
Stock-based compensation                
Number of shares of common stock initially available for award 800,000              
Number of shares of Common Stock available for future award grants 0              
2006 Plan | Restricted stock
               
Stock-based compensation                
Granted (in shares) 40,000 92,000 15,000 150,500 140,000 57,500 30,000 315,000
Forfeited (in shares)   3,525 8,375 5,875   3,500 12,500  
Number of equal quarterly installments for vesting of awards 16 20 20 20 20 20 20 20
2006 Plan | Restricted stock | CEO
               
Stock-based compensation                
Granted (in shares)               200,000
Number of equal quarterly installments for vesting of awards               40
2012 Plan
               
Stock-based compensation                
Number of shares of common stock initially available for award 600,000              
Number of shares of Common Stock available for future award grants 593,775