Quarterly report pursuant to Section 13 or 15(d)

Condensed Statements of Stockholders' Equity

v3.19.2
Condensed Statements of Stockholders' Equity - USD ($)
shares in Thousands, $ in Thousands
Total
Common Stock [Member]
Additional Paid-in Capital [Member]
Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated Deficit [Member]
Beginning balance at Dec. 31, 2017 $ 27,996 $ 3 $ 196,077 $ (77) $ (168,007)
Beginning balance, shares at Dec. 31, 2017   30,035      
Issuance of common stock upon exercise of stock options 37 $ 0 37 0 0
Issuance of common stock upon exercise of stock options, shares   28      
Share-based compensation 983 $ 0 983 0 0
Cumulative effect of adoption of accounting standard (612) 0 0 0 (612)
Net loss (5,018) 0 0 0 (5,018)
Unrealized gain (loss) on marketable securities (35) 0 0 (35) 0
Ending balance at Mar. 31, 2018 23,351 $ 3 197,097 (112) (173,637)
Ending balance, shares at Mar. 31, 2018   30,063      
Beginning balance at Dec. 31, 2017 27,996 $ 3 196,077 (77) (168,007)
Beginning balance, shares at Dec. 31, 2017   30,035      
Net loss (9,515)        
Unrealized gain (loss) on marketable securities 36        
Ending balance at Jun. 30, 2018 19,971 $ 3 198,143 (41) (178,134)
Ending balance, shares at Jun. 30, 2018   30,145      
Beginning balance at Mar. 31, 2018 23,351 $ 3 197,097 (112) (173,637)
Beginning balance, shares at Mar. 31, 2018   30,063      
Issuance of common stock upon exercise of stock options 66 $ 0 66 0 0
Issuance of common stock upon exercise of stock options, shares   66      
Issuance of common stock for employee stock purchase plan 51 $ 0 51 0 0
Issuance of common stock for employee stock purchase plan, shares   16      
Share-based compensation 929 $ 0 929 0 0
Net loss (4,497) 0 0 0 (4,497)
Unrealized gain (loss) on marketable securities 71 0 0 71 0
Ending balance at Jun. 30, 2018 19,971 $ 3 198,143 (41) (178,134)
Ending balance, shares at Jun. 30, 2018   30,145      
Beginning balance at Dec. 31, 2018 27,399 $ 3 214,042 (17) (186,629)
Beginning balance, shares at Dec. 31, 2018   33,165      
Share-based compensation 926 $ 0 926 0 0
Net loss (4,747) 0 0 0 (4,747)
Unrealized gain (loss) on marketable securities 20 0 0 20 0
Ending balance at Mar. 31, 2019 23,598 $ 3 214,968 3 (191,376)
Ending balance, shares at Mar. 31, 2019   33,165      
Beginning balance at Dec. 31, 2018 $ 27,399 $ 3 214,042 (17) (186,629)
Beginning balance, shares at Dec. 31, 2018   33,165      
Issuance of common stock upon exercise of stock options, shares 0        
Net loss $ (5,403)        
Unrealized gain (loss) on marketable securities 22        
Ending balance at Jun. 30, 2019 24,109 $ 3 216,133 5 (192,032)
Ending balance, shares at Jun. 30, 2019   33,170      
Beginning balance at Mar. 31, 2019 23,598 $ 3 214,968 3 (191,376)
Beginning balance, shares at Mar. 31, 2019   33,165      
Issuance of common stock for employee stock purchase plan 4 $ 0 4 0 0
Issuance of common stock for employee stock purchase plan, shares   5      
Share-based compensation 1,161 $ 0 1,161 0 0
Net loss (656) 0 0 0 (656)
Unrealized gain (loss) on marketable securities 2 0 0 2 0
Ending balance at Jun. 30, 2019 $ 24,109 $ 3 $ 216,133 $ 5 $ (192,032)
Ending balance, shares at Jun. 30, 2019   33,170