CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY - USD ($) $ in Thousands |
Common stock
January Offering
|
Common stock
June Offering
|
Common stock
Over Allotment January
|
Common stock
Over Allotment June
|
Common stock
Cumulative Effect, Period of Adoption, Adjusted Balance [Member]
|
Common stock |
Additional paid in capital
January Offering
|
Additional paid in capital
June Offering
|
Additional paid in capital
Over Allotment January
|
Additional paid in capital
Over Allotment June
|
Additional paid in capital
Cumulative Effect, Period of Adoption, Adjusted Balance [Member]
|
Additional paid in capital |
Accumulated other comprehensive (loss) income
Cumulative Effect, Period of Adoption, Adjusted Balance [Member]
|
Accumulated other comprehensive (loss) income |
Accumulated deficit
Cumulative Effect, Period of Adoption, Adjustment [Member]
|
Accumulated deficit
Cumulative Effect, Period of Adoption, Adjusted Balance [Member]
|
Accumulated deficit |
January Offering |
June Offering |
Over Allotment January |
Over Allotment June |
Cumulative Effect, Period of Adoption, Adjustment [Member] |
Cumulative Effect, Period of Adoption, Adjusted Balance [Member] |
Total |
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Increase (Decrease) in Stockholders' Equity | ||||||||||||||||||||||||
Beginning balance as adjusted, shares | 562,119,334 | |||||||||||||||||||||||
Balance at the beginning of the period, shares at Dec. 31, 2017 | 562,119,334 | |||||||||||||||||||||||
Balance at the beginning of the period at Dec. 31, 2017 | $ 854 | $ 854 | $ 455,401 | $ 455,401 | $ (21,641) | $ (21,641) | $ 8,645 | $ (222,985) | $ (231,630) | $ 8,645 | $ 211,629 | $ 202,984 | ||||||||||||
Increase (Decrease) in Stockholders' Equity | ||||||||||||||||||||||||
Issuance of shares upon exercise of stock options | $ 7 | 3,030 | $ 3,037 | |||||||||||||||||||||
Issuance of shares upon exercise of stock options (in shares) | 5,334,936 | 5,334,936 | ||||||||||||||||||||||
Issuance of shares upon completion of public offering, net of issuance costs | $ 78 | 99,575 | $ 99,653 | |||||||||||||||||||||
Issuance of shares upon completion of public offering, net of issuance costs (in shares) | 60,000,000 | |||||||||||||||||||||||
Other comprehensive income (loss) | 11,878 | 11,878 | ||||||||||||||||||||||
Share-based compensation expense | 16,202 | 16,202 | ||||||||||||||||||||||
Net loss | (95,514) | (95,514) | ||||||||||||||||||||||
Balance at the end of the period at Dec. 31, 2018 | $ 939 | 574,208 | (9,763) | (318,499) | 246,885 | |||||||||||||||||||
Balance at the end of the period, shares at Dec. 31, 2018 | 627,454,270 | |||||||||||||||||||||||
Increase (Decrease) in Stockholders' Equity | ||||||||||||||||||||||||
Issuance of shares upon exercise of stock options | $ 4 | 362 | $ 366 | |||||||||||||||||||||
Issuance of shares upon exercise of stock options (in shares) | 3,549,298 | 3,549,298 | ||||||||||||||||||||||
Other comprehensive income (loss) | 2,499 | $ 2,499 | ||||||||||||||||||||||
Share-based compensation expense | 11,053 | 11,053 | ||||||||||||||||||||||
Net loss | (137,165) | (137,165) | ||||||||||||||||||||||
Balance at the end of the period at Dec. 31, 2019 | $ 943 | 585,623 | (7,264) | (455,664) | $ 123,638 | |||||||||||||||||||
Balance at the end of the period, shares at Dec. 31, 2019 | 631,003,568 | 631,003,568 | ||||||||||||||||||||||
Increase (Decrease) in Stockholders' Equity | ||||||||||||||||||||||||
Issuance of shares upon exercise of stock options | $ 14 | 5,649 | $ 5,663 | |||||||||||||||||||||
Issuance of shares upon exercise of stock options (in shares) | 11,401,390 | 11,401,390 | ||||||||||||||||||||||
Issuance of shares upon completion of public offering, net of issuance costs | $ 165 | $ 155 | $ 24 | $ 24 | $ 78,451 | $ 209,831 | $ 11,914 | $ 33,824 | $ 78,616 | $ 209,986 | $ 11,938 | $ 33,848 | ||||||||||||
Issuance of shares upon completion of public offering, net of issuance costs (in shares) | 126,000,000 | 123,000,000 | 18,900,000 | 18,450,000 | ||||||||||||||||||||
Other comprehensive income (loss) | (2,784) | $ (2,784) | ||||||||||||||||||||||
Share-based compensation expense | 10,414 | 10,414 | ||||||||||||||||||||||
Net loss | (130,092) | (130,092) | ||||||||||||||||||||||
Balance at the end of the period at Dec. 31, 2020 | $ 1,325 | $ 935,706 | $ (10,048) | $ (585,756) | $ 341,227 | |||||||||||||||||||
Balance at the end of the period, shares at Dec. 31, 2020 | 928,754,958 | 928,754,958 |