Quarterly report pursuant to Section 13 or 15(d)

Statements of Stockholders' Equity (Deficit)

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Statements of Stockholders' Equity (Deficit) (USD $)
In Thousands, except Share data
Total
Series A Convertible Preferred Stock
Common Stock
Additional Paid-In Capital
Accumulated Deficit
Beginning Balance at Dec. 31, 2012 $ (80,770) $ 247 $ 1   $ (81,018)
Beginning Balance, shares at Dec. 31, 2012   66,666 272,096    
Stock-based compensation 24     24  
Stock options exercised 1     1  
Stock options exercised, shares     222    
Less deemed dividend on redeemable convertible preferred stock (1,723)     (25) (1,698)
Net income 730       730
Ending Balance at Mar. 31, 2013 (81,738) 247 1   (81,986)
Ending Balance, shares at Mar. 31, 2013   66,666 272,318    
Stock-based compensation 206     206  
Stock options exercised 9     9  
Stock options exercised, shares     8,656    
Warrants exercised 1     1  
Less deemed dividend on redeemable convertible preferred stock (5,555)     (216) (5,339)
Net income 24,705       24,705
Ending Balance at Dec. 31, 2013 (62,372) 247 1   (62,620)
Ending Balance, shares at Dec. 31, 2013   66,666 280,974    
Stock-based compensation 131     43 88
Stock options exercised 11     11  
Stock options exercised, shares 8,975   8,975    
Warrants exercised 22     22  
Less deemed dividend on redeemable convertible preferred stock (987)       (987)
Conversion of preferred stock 120,251 (247) 14 120,484  
Conversion of preferred stock, shares   (66,666) 14,259,647    
Issuance of common stock in connection with initial public offering 49,884   3 49,881  
Issuance of common stock in connection with initial public offering, shares     3,529,411    
Net income 888       888
Reclassification of warrant liability 76     76  
Ending Balance at Mar. 31, 2014 $ 107,904   $ 18 $ 170,517 $ (62,631)
Ending Balance, shares at Mar. 31, 2014     18,151,551