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v3.20.2

Consolidated Statements of Changes in Stockholders’ Equity (Deficit) - USD ($) $ in Thousands | Total | Common stock | Additional paid-In Capital | Accumulated deficit | Accumulated other comprehensive loss
--- | --- | --- | --- | --- | ---
Beginning balance (in shares) at Dec. 31, 2018 |  | 22,471,776 |  |  |
Beginning balance at Dec. 31, 2018 | $ (5,418) | $ 3 | $ 279,539 | $ (280,403) | $ (4,557)
Increase (Decrease) in Stockholders' Equity |  |  |  |  |
Issuance of common stock under Employee Stock Purchase Plan (in shares) |  | 11,943 |  |  |
Issuance of common stock under Employee Stock Purchase Plan | 20 |  | 20 |  |
Issuance of common stock upon exercise of options (in shares) |  | 115,600 |  |  |
Issuance of common stock upon exercise of options | 145 |  | 145 |  |
Stock‑based compensation expense | 1,180 |  | 1,180 |  |
Foreign currency translation adjustment | 22 |  |  |  | 22
Net loss | (12,074) |  |  | (12,074) |
Issuance of common stock, net of issuance costs (in shares) |  | 22,188,706 |  |  |
Issuance of common stock, net of issuance costs | 30,942 | $ 2 | 30,940 |  |
Unrealized gain on securities | 2 |  |  |  | 2
Ending balance (in shares) at Mar. 31, 2019 |  | 44,788,025 |  |  |
Ending balance at Mar. 31, 2019 | 14,819 | $ 5 | 311,824 | (292,477) | (4,533)
Beginning balance (in shares) at Dec. 31, 2018 |  | 22,471,776 |  |  |
Beginning balance at Dec. 31, 2018 | (5,418) | $ 3 | 279,539 | (280,403) | (4,557)
Increase (Decrease) in Stockholders' Equity |  |  |  |  |
Foreign currency translation adjustment | 29 |  |  |  |
Net loss | (28,468) |  |  |  |
Unrealized gain on securities | 3 |  |  |  |
Ending balance (in shares) at Jun. 30, 2019 |  | 44,952,951 |  |  |
Ending balance at Jun. 30, 2019 | 56 | $ 5 | 313,447 | (308,871) | (4,525)
Beginning balance (in shares) at Mar. 31, 2019 |  | 44,788,025 |  |  |
Beginning balance at Mar. 31, 2019 | 14,819 | $ 5 | 311,824 | (292,477) | (4,533)
Increase (Decrease) in Stockholders' Equity |  |  |  |  |
Issuance of common stock through at-the-market offering, net (in shares) |  | 164,926 |  |  |
Issuance of common stock through at-the-market offering, net | 372 |  | 372 |  |
Stock‑based compensation expense | 1,251 |  | 1,251 |  |
Foreign currency translation adjustment | 7 |  |  |  | 7
Net loss | (16,394) |  |  | (16,394) |
Unrealized gain on securities | 1 |  |  |  | 1
Ending balance (in shares) at Jun. 30, 2019 |  | 44,952,951 |  |  |
Ending balance at Jun. 30, 2019 | $ 56 | $ 5 | 313,447 | (308,871) | (4,525)
Beginning balance (in shares) at Dec. 31, 2019 | 86,325,547 | 86,325,547 |  |  |
Beginning balance at Dec. 31, 2019 | $ 8,397 | $ 9 | 348,664 | (335,753) | (4,523)
Increase (Decrease) in Stockholders' Equity |  |  |  |  |
Issuance of common stock under Employee Stock Purchase Plan (in shares) |  | 78,583 |  |  |
Issuance of common stock under Employee Stock Purchase Plan | 114 |  | 114 |  |
Issuance of common stock upon exercise of options (in shares) |  | 5,128 |  |  |
Issuance of common stock upon exercise of options | 3 |  | 3 |  |
Issuance of vested restricted stock units (in shares) |  | 10,937 |  |  |
Issuance of common stock through at-the-market offering, net (in shares) |  | 598,977 |  |  |
Issuance of common stock through at-the-market offering, net | 1,141 |  | 1,141 |  |
Other financing fees | (147) |  | (147) |  |
Stock‑based compensation expense | 1,409 |  | 1,409 |  |
Foreign currency translation adjustment | (60) |  |  |  | (60)
Net loss | (19,620) |  |  | (19,620) |
Ending balance (in shares) at Mar. 31, 2020 |  | 87,019,172 |  |  |
Ending balance at Mar. 31, 2020 | $ (8,763) | $ 9 | 351,184 | (355,373) | (4,583)
Beginning balance (in shares) at Dec. 31, 2019 | 86,325,547 | 86,325,547 |  |  |
Beginning balance at Dec. 31, 2019 | $ 8,397 | $ 9 | 348,664 | (335,753) | (4,523)
Increase (Decrease) in Stockholders' Equity |  |  |  |  |
Foreign currency translation adjustment | (29) |  |  |  |
Net loss | $ (43,701) |  |  |  |
Issuance of common stock upon exercise of common warrants (in shares) | 16,585,148,000 | 4,934,723 |  |  |
Unrealized gain on securities | $ 0 |  |  |  |
Ending balance (in shares) at Jun. 30, 2020 | 100,847,810 | 100,847,810 |  |  |
Ending balance at Jun. 30, 2020 | $ (13,052) | $ 10 | 370,944 | (379,454) | (4,552)
Beginning balance (in shares) at Mar. 31, 2020 |  | 87,019,172 |  |  |
Beginning balance at Mar. 31, 2020 | (8,763) | $ 9 | 351,184 | (355,373) | (4,583)
Increase (Decrease) in Stockholders' Equity |  |  |  |  |
Issuance of common stock upon exercise of options (in shares) |  | 37,500 |  |  |
Issuance of common stock upon exercise of options | 98 |  | 98 |  |
Issuance of vested restricted stock units (in shares) |  | 10,938 |  |  |
Issuance of common stock through at-the-market offering, net (in shares) |  | 470,509 |  |  |
Issuance of common stock through at-the-market offering, net | 967 |  | 967 |  |
Stock‑based compensation expense | 1,481 |  | 1,481 |  |
Foreign currency translation adjustment | 31 |  |  |  | 31
Net loss | (24,081) |  |  | (24,081) |
Issuance of common stock upon exercise of pre-funded warrants (in shares) |  | 8,342,128 |  |  |
Issuance of common stock upon exercise of pre-funded warrants | 1 | $ 1 |  |  |
Issuance of common stock upon exercise of common warrants (in shares) |  | 4,967,563 |  |  |
Issuance of common stock upon exercise of common warrants | 17,214 | $ 0 | 17,214 |  |
Unrealized gain on securities | $ 0 |  |  |  |
Ending balance (in shares) at Jun. 30, 2020 | 100,847,810 | 100,847,810 |  |  |
Ending balance at Jun. 30, 2020 | $ (13,052) | $ 10 | $ 370,944 | $ (379,454) | $ (4,552)

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