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Condensed Consolidated Statements of Stockholders’ Equity (Deficit) - USD ($)
$ in Thousands
Common Stock
Additional Paid-In-Capital
Accumulated Other Comprehensive Gain (Loss)
Accumulated Deficit
Total
Balance at beginning at Dec. 31, 2019 $ 3 $ 259,049 $ (6) $ (130,320) $ 128,726
Balance at beginning (in shares) at Dec. 31, 2019 28,567,837        
Exercise of stock options   112     112
Exercise of stock options (in shares) 103,385        
Vesting of restricted stock   30     30
Stock-based compensation expense   1,238     1,238
Disgorgement of stockholders' short-swing profits, net   52     52
Net unrealized gain on short-term marketable securities     51   51
Net loss       (11,886) (11,886)
Balance at ending at Mar. 31, 2020 $ 3 260,481 45 (142,206) 118,323
Balance at ending (in shares) at Mar. 31, 2020 28,671,222        
Balance at beginning at Dec. 31, 2019 $ 3 259,049 (6) (130,320) 128,726
Balance at beginning (in shares) at Dec. 31, 2019 28,567,837        
Net loss         (79,207)
Balance at ending at Dec. 31, 2020 $ 4 468,238 (3) (209,527) 258,712
Balance at ending (in shares) at Dec. 31, 2020 34,741,649        
Exercise of stock options   24     $ 24
Exercise of stock options (in shares) 28,670       28,670
Vesting of restricted stock   9     $ 9
Stock-based compensation expense   2,364     2,364
Net unrealized gain on short-term marketable securities     1   1
Net loss       (15,090) (15,090)
Balance at ending at Mar. 31, 2021 $ 4 $ 470,635 $ (2) $ (224,617) $ 246,020
Balance at ending (in shares) at Mar. 31, 2021 34,770,319