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Consolidated Statements of Stockholders' Deficit (Unaudited) - USD ($)
$ in Thousands
Common Stock [Member]
Additional Paid-in Capital [Member]
AOCI Attributable to Parent [Member]
Retained Earnings [Member]
Total
Balance at Dec. 31, 2020 $ 1,769 $ 1,002,408 $ 3 $ (1,023,442) $ (19,262)
Net loss       (64,284) (64,284)
Other comprehensive income (loss)     179   179
Employee stock purchase plan 2 721     723
Exercise of stock options, net 6 2,171     2,177
Stock-based compensation expense   5,479     5,479
Balance at Mar. 31, 2021 1,777 1,010,779 182 (1,087,726) (74,988)
Balance at Dec. 31, 2021 1,843 1,098,498 177 (1,207,504) (106,986)
Net loss       (74,196) (74,196)
Other comprehensive income (loss)     9   9
Employee stock purchase plan 1 1,503     1,504
Exercise of stock options, net 12 5,841     5,853
Stock-based compensation expense   9,601     9,601
Balance at Mar. 31, 2022 $ 1,856 $ 1,115,443 $ 186 $ (1,281,700) $ (164,215)