Condensed Consolidated Statements of Stockholders' Equity (unaudited) - USD ($) $ in Thousands |
Total |
Common Stock [Member] |
Additional Paid-In Capital [Member] |
Accumulated Deficit [Member] |
Accumulated Other Comprehensive Income (Loss) [Member] |
Beginning balances at Dec. 31, 2019 |
$ 216,352
|
$ 32
|
$ 626,401
|
$ (409,768)
|
$ (313)
|
Beginning balances, shares at Dec. 31, 2019 |
|
31,544,361
|
|
|
|
Exercise of common stock options |
17,364
|
|
17,364
|
|
|
Exercise of common stock options, shares |
|
390,476
|
|
|
|
Issuance of common stock upon release of restricted stock units |
|
99,790
|
|
|
|
Shares withheld for tax obligations |
(1,187)
|
|
(1,187)
|
|
|
Shares withheld for tax obligations, shares |
|
(11,055)
|
|
|
|
Stock based compensation |
8,483
|
|
8,483
|
|
|
Net loss |
(24,888)
|
|
|
(24,888)
|
|
Other comprehensive loss |
(1,044)
|
|
|
|
(1,044)
|
Ending balances at Mar. 31, 2020 |
215,080
|
$ 32
|
651,061
|
(434,656)
|
(1,357)
|
Ending balances, shares at Mar. 31, 2020 |
|
32,023,572
|
|
|
|
Beginning balances at Dec. 31, 2019 |
216,352
|
$ 32
|
626,401
|
(409,768)
|
(313)
|
Beginning balances, shares at Dec. 31, 2019 |
|
31,544,361
|
|
|
|
Net loss |
(75,936)
|
|
|
|
|
Other comprehensive loss |
362
|
|
|
|
|
Ending balances at Sep. 30, 2020 |
379,780
|
$ 35
|
865,400
|
(485,704)
|
49
|
Ending balances, shares at Sep. 30, 2020 |
|
34,419,299
|
|
|
|
Beginning balances at Dec. 31, 2019 |
216,352
|
$ 32
|
626,401
|
(409,768)
|
(313)
|
Beginning balances, shares at Dec. 31, 2019 |
|
31,544,361
|
|
|
|
Net loss |
(83,100)
|
|
|
|
|
Ending balances at Dec. 31, 2020 |
388,460
|
$ 35
|
880,660
|
(492,833)
|
598
|
Ending balances, shares at Dec. 31, 2020 |
|
34,583,064
|
|
|
|
Beginning balances at Mar. 31, 2020 |
215,080
|
$ 32
|
651,061
|
(434,656)
|
(1,357)
|
Beginning balances, shares at Mar. 31, 2020 |
|
32,023,572
|
|
|
|
Issuance of common stock upon underwritten public offering, net of issuance costs |
147,144
|
$ 2
|
147,142
|
|
|
Issuance of common stock upon underwritten public offering, net of issuance costs, shares |
|
1,868,750
|
|
|
|
Conversion feature of convertible senior notes due 2025, net of allocated costs |
48,340
|
|
48,340
|
|
|
Purchase of bond hedges |
(52,390)
|
|
(52,390)
|
|
|
Sale of warrants |
34,933
|
|
34,933
|
|
|
Exercise of common stock options |
8,357
|
|
8,357
|
|
|
Exercise of common stock options, shares |
|
196,024
|
|
|
|
Issuance of common stock upon release of restricted stock units |
|
146,105
|
|
|
|
Shares withheld for tax obligations |
(1,551)
|
|
(1,551)
|
|
|
Shares withheld for tax obligations, shares |
|
(12,694)
|
|
|
|
Issuance of common stock under employee stock purchase plan |
4,690
|
|
4,690
|
|
|
Issuance of common stock under employee stock purchase plan, shares |
|
52,733
|
|
|
|
Stock based compensation |
10,087
|
|
10,087
|
|
|
Net loss |
(41,063)
|
|
|
(41,063)
|
|
Other comprehensive loss |
801
|
|
|
|
801
|
Ending balances at Jun. 30, 2020 |
374,428
|
$ 34
|
850,669
|
(475,719)
|
(556)
|
Ending balances, shares at Jun. 30, 2020 |
|
34,274,490
|
|
|
|
Exercise of common stock options |
3,202
|
$ 1
|
3,201
|
|
|
Exercise of common stock options, shares |
|
89,988
|
|
|
|
Issuance of common stock upon release of restricted stock units |
|
72,331
|
|
|
|
Shares withheld for tax obligations |
(2,441)
|
|
(2,441)
|
|
|
Shares withheld for tax obligations, shares |
|
(17,510)
|
|
|
|
Stock based compensation |
13,971
|
|
13,971
|
|
|
Net loss |
(9,985)
|
|
|
(9,985)
|
|
Other comprehensive loss |
605
|
|
|
|
605
|
Ending balances at Sep. 30, 2020 |
379,780
|
$ 35
|
865,400
|
(485,704)
|
49
|
Ending balances, shares at Sep. 30, 2020 |
|
34,419,299
|
|
|
|
Beginning balances at Dec. 31, 2020 |
388,460
|
$ 35
|
880,660
|
(492,833)
|
598
|
Beginning balances, shares at Dec. 31, 2020 |
|
34,583,064
|
|
|
|
Exercise of common stock options |
1,331
|
|
1,331
|
|
|
Exercise of common stock options, shares |
|
28,152
|
|
|
|
Issuance of common stock upon release of restricted stock units |
|
99,389
|
|
|
|
Shares withheld for tax obligations |
(2,801)
|
|
(2,801)
|
|
|
Shares withheld for tax obligations, shares |
|
(17,886)
|
|
|
|
Stock based compensation |
9,235
|
|
9,235
|
|
|
Net loss |
(29,561)
|
|
|
(29,561)
|
|
Other comprehensive loss |
(459)
|
|
|
|
(459)
|
Ending balances at Mar. 31, 2021 |
366,205
|
$ 35
|
888,425
|
(522,394)
|
139
|
Ending balances, shares at Mar. 31, 2021 |
|
34,692,719
|
|
|
|
Beginning balances at Dec. 31, 2020 |
388,460
|
$ 35
|
880,660
|
(492,833)
|
598
|
Beginning balances, shares at Dec. 31, 2020 |
|
34,583,064
|
|
|
|
Net loss |
(101,226)
|
|
|
|
|
Other comprehensive loss |
(778)
|
|
|
|
|
Ending balances at Sep. 30, 2021 |
319,202
|
$ 35
|
913,406
|
(594,059)
|
(180)
|
Ending balances, shares at Sep. 30, 2021 |
|
34,898,631
|
|
|
|
Beginning balances at Mar. 31, 2021 |
366,205
|
$ 35
|
888,425
|
(522,394)
|
139
|
Beginning balances, shares at Mar. 31, 2021 |
|
34,692,719
|
|
|
|
Exercise of common stock options |
305
|
|
305
|
|
|
Exercise of common stock options, shares |
|
5,998
|
|
|
|
Issuance of common stock upon release of restricted stock units |
|
133,609
|
|
|
|
Shares withheld for tax obligations |
(2,314)
|
|
(2,314)
|
|
|
Shares withheld for tax obligations, shares |
|
(15,142)
|
|
|
|
Issuance of common stock under employee stock purchase plan |
4,648
|
|
4,648
|
|
|
Issuance of common stock under employee stock purchase plan, shares |
|
37,753
|
|
|
|
Issuance of common stock from conversion of convertible senior notes due 2021 |
|
$ 1
|
(1)
|
|
|
Issuance of common stock from conversion of convertible senior notes due 2021, shares |
|
682,912
|
|
|
|
Exercise of bond hedge for convertible senior notes due 2021 |
|
$ (1)
|
1
|
|
|
Exercise of bond hedge for convertible senior notes due 2021, shares |
|
(682,916)
|
|
|
|
Stock based compensation |
11,032
|
|
11,032
|
|
|
Net loss |
(21,590)
|
|
|
(21,590)
|
|
Other comprehensive loss |
90
|
|
|
|
90
|
Ending balances at Jun. 30, 2021 |
358,376
|
$ 35
|
902,096
|
(543,984)
|
229
|
Ending balances, shares at Jun. 30, 2021 |
|
34,854,933
|
|
|
|
Exercise of common stock options |
51
|
|
51
|
|
|
Exercise of common stock options, shares |
|
1,773
|
|
|
|
Issuance of common stock upon release of restricted stock units |
|
52,611
|
|
|
|
Shares withheld for tax obligations |
(1,375)
|
|
(1,375)
|
|
|
Shares withheld for tax obligations, shares |
|
(10,686)
|
|
|
|
Stock based compensation |
12,634
|
|
12,634
|
|
|
Net loss |
(50,075)
|
|
|
(50,075)
|
|
Other comprehensive loss |
(409)
|
|
|
|
(409)
|
Ending balances at Sep. 30, 2021 |
$ 319,202
|
$ 35
|
$ 913,406
|
$ (594,059)
|
$ (180)
|
Ending balances, shares at Sep. 30, 2021 |
|
34,898,631
|
|
|
|