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CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY - USD ($)
$ in Thousands
Preferred Stock
Common Stock
Additional Paid-In Capital
Accumulated Deficit
Total
Beginning Balance, Shares at Dec. 31, 2013   17,684,000      
Beginning Balance, Amount at Dec. 31, 2013 $ 0 $ 18 $ 28,687 $ (9,634) $ 19,071
Options exercised, Shares   221,000      
Options exercised, Amount     469   469
Stock based compensation     388   388
Stock swap to acquire options, Shares   (51,000)      
Stock swap to acquire options, Amount     (210)   (210)
Accretion on convertible preferred stock       (932) (932)
Net income (loss)       (17,282) (17,282)
Ending Balance, Shares at Dec. 31, 2014   17,852,000      
Ending Balance, Amount at Dec. 31, 2014 $ 0 $ 18 29,334 (27,848) 1,504
Options exercised, Shares   98,000      
Options exercised, Amount     220   220
Warrant exercised, Shares   739,000      
Warrant exercised, Amount     1,519   1,519
Issuance of common stock, Shares   5,219,000      
Issuance of common stock, Amount   $ 5 11,526   11,531
Conversion of Series A Preferred stock and common warrants to Series B preferred stock, Shares 3,588,000        
Conversion of Series A Preferred stock and common warrants to Series B preferred stock, Amount $ 4   (40) 13,956 13,920
Conversion of Series B convertible preferred to common stock, Shares (1,612,000) 3,225,000      
Conversion of Series B convertible preferred to common stock, Amount $ (2) $ 4 (2)    
Stock based compensation     575   575
Stock swap to acquire options, Shares   (81,000)      
Stock swap to acquire options, Amount     (273)   (273)
Accretion on convertible preferred stock       (222) (222)
Net income (loss)       (5,370) (5,370)
Ending Balance, Shares at Dec. 31, 2015 1,976,000        
Ending Balance, Amount at Dec. 31, 2015 $ 2 $ 27 $ 42,859 $ (19,484) $ 23,404