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Stockholders' Equity (Details) (USD $)
 0 Months Ended 12 Months Ended 0 Months Ended 12 Months Ended
Jun. 20, 2011
investor
Dec. 31, 2012
Dec. 31, 2011
Mar. 01, 2012
Feb. 29, 2012
Dec. 31, 2012
Minimum
Dec. 31, 2012
Maximum
Oct. 11, 2011
Line of Credit
Bridge Bank, N.A.
Jun. 20, 2011
Common Stock
Dec. 31, 2012
Common Stock
Oct. 11, 2011
Common Stock
Line of Credit
Bridge Bank, N.A.
Dec. 31, 2012
Treasury Stock
Dec. 31, 2011
Treasury Stock
Dec. 31, 2012
Common Stock
Dec. 31, 2011
Common Stock
Equity and Long Term Debt [Line Items]                              
Common stock shares authorized (in shares)   40,000,000 20,000,000 40,000,000 20,000,000                    
Treasury stock, retired (in shares)   21,270 164,869                 21,270 164,869    
Treasury stock, value   $ 0 $ 0                 $ (80,807) $ (626,502) $ 21 $ 165
Number of Investors Entered into Subscription Agreement 17                            
Common stock, subscription agreement, shares 1,350,000                            
Warrant, exercise period 5 years                            
Class of warrant or right, number of securities called by warrants or rights (in shares)                 675,000            
Proceeds from sale of common stock, net 2,700,000 0 2,635,796                        
Warrant, number of securities called by each warrant                 0.50            
Warrant, number of securities called by each warrant, purchase price                 $ 2.00            
Class of warrant or right, exercise price of warrants or rights (usd per unit) 2.20         0.87 15.00 0.87              
Repayments of Lines of Credit 1,000,000                            
Sale of stock, net of stock issuance costs (in shares)                 1,017,742           1,350,000
Shares paid for tax withholding                 284,962         10,970  
Shares withheld for taxes on restricted stock awards (in shares)   7,762                   7,762      
Payments for tax withholding $ 256,000                            
Warrants outstanding                   816,724 51,724        
Warrant, weighted average contractual term   3 years 5 months 25 days                          
Warrant, weighted average exercise price (usd per share)   $ 2.37