Annual report pursuant to Section 13 and 15(d)

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (DEFICIT)

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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (DEFICIT) (USD $)
In Thousands
Total
Common Stock [Member]
Class A common stock [Member]
Class B common stock [Member]
Additional Paid-In Capital [Member]
Accumulated Other Comprehensive Income [Member]
Accumulated Deficit [Member]
Beginning Balance at Dec. 31, 2009 $ (19,475) $ 1     $ 2,301   $ (21,777)
Beginning Balance, Shares at Dec. 31, 2009   10,737          
Conversion of Series A and B preferred stock to Class A and B common stock 35,351     1 35,350    
Conversion of Series A and B preferred stock to Class A and B common stock, Shares     1,491 13,035      
Conversion of common stock to Class B common stock   (1)   1      
Conversion of common stock to Class B common stock, Shares   (10,737)   10,737      
Conversion of Class B common stock to Class A common stock, Shares     5,680 (5,680)      
IPO gross proceeds, net of costs 72,904   1   72,903    
IPO gross proceeds, net of costs, Shares     5,920        
Common stock issued upon exercise of stock options 1,043       1,043    
Common stock issued upon exercise of stock options, Shares       628      
Employee stock purchase plan 700       700    
Employee stock purchase plan, Shares     79        
Stock-based compensation 4,215       4,215    
Other comprehensive income (loss) 45         45  
Net income (loss) 10,114           10,114
Ending Balance at Dec. 31, 2010 104,897   1 2 116,512 45 (11,663)
Ending Balance, Shares at Dec. 31, 2010     13,170 18,720      
Conversion of Class B common stock to Class A common stock     1 (1)      
Conversion of Class B common stock to Class A common stock, Shares     5,557 (5,557)      
Common stock issued pursuant to equity awards, net 1,469       1,469    
Common stock issued pursuant to equity awards, net, Shares     133 980      
Employee stock purchase plan 1,346       1,346    
Employee stock purchase plan, Shares     247        
Stock-based compensation 7,368       7,368    
Other comprehensive income (loss) (31)         (31)  
Net income (loss) (22,024)           (22,024)
Ending Balance at Dec. 31, 2011 93,025   2 1 126,695 14 (33,687)
Ending Balance, Shares at Dec. 31, 2011     19,107 14,143      
Conversion of Class B common stock to Class A common stock, Shares     3,991 (3,991)      
Common stock issued pursuant to equity awards, net 617       617    
Common stock issued pursuant to equity awards, net, Shares     740 521      
Repurchases of common stock (12,076)           (12,076)
Common stock issued upon exercise of stock options, Shares 521            
Repurchases of common stock, Shares     (1,152) (1,000)      
Employee stock purchase plan 1,914       1,914    
Employee stock purchase plan, Shares     495        
Stock-based compensation 9,984       9,984    
Other comprehensive income (loss) 21         21  
Net income (loss) (13,252)           (13,252)
Ending Balance at Dec. 31, 2012 $ 80,233   $ 2 $ 1 $ 139,210 $ 35 $ (59,015)
Ending Balance, Shares at Dec. 31, 2012     23,181 9,673