Quarterly report pursuant to Section 13 or 15(d)

STATEMENTS OF STOCKHOLDER'S EQUITY (Unaudited)

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STATEMENTS OF STOCKHOLDER'S EQUITY (Unaudited) - USD ($)
$ in Thousands
Total
Common Stock [Member]
Additional Paid-In Capital [Member]
Shares in Treasury [Member]
Accumulated Deficit [Member]
Beginning balance at Dec. 31, 2017 $ 57,476 $ 3 $ 112,021   $ (54,548)
Beginning balance, shares at Dec. 31, 2017   27,718,780      
Issuance of common stock $ 0 $ 0 $ 0 $ 0 $ 0
Issuance of common stock, shares 0 0 0 0 0
Shares purchased $ 0 $ 0 $ 0 $ 0 $ 0
Shares purchased, shares 0 0 0 0 0
Stock options exercised $ 714   $ 714    
Stock options exercised, shares   236,001      
Expense for all awards vesting in period, net of forfeitures and modifications 40   40    
Net loss (4,370)       $ (4,370)
Ending balance at Mar. 31, 2018 53,860 $ 3 112,775   (58,918)
Ending balance, shares at Mar. 31, 2018   27,954,781      
Beginning balance at Dec. 31, 2018 93,397 $ 3 176,069 $ (230) (82,445)
Beginning balance, shares at Dec. 31, 2018   32,648,893      
Issuance of common stock $ 0 $ 0 $ 0 $ 0 $ 0
Issuance of common stock, shares 0 0 0 0 0
Shares purchased $ 0 $ 0 $ 0 $ 0 $ 0
Shares purchased, shares 0 0 0 0 0
Stock options exercised $ 125   $ 125    
Stock options exercised, shares 34,402 43,296      
Expense for all awards vesting in period, net of forfeitures and modifications $ 1,556   1,556    
Net loss (7,375)       $ (7,375)
Ending balance at Mar. 31, 2019 $ 87,703 $ 3 $ 177,750 $ (230) $ (89,820)
Ending balance, shares at Mar. 31, 2019   32,692,189