CONDENSED STATEMENTS OF STOCKHOLDERS’ EQUITY - USD ($)
$ in Thousands |
Total |
Common Stock |
Treasury Stock |
Additional Paid-in Capital |
Accumulated Deficit |
| Beginning balance (in shares) at Dec. 31, 2019 |
|
28,796,371
|
29,967
|
|
|
| Beginning balance at Dec. 31, 2019 |
$ 59,978
|
$ 29
|
$ (24)
|
$ 222,131
|
$ (162,158)
|
| Increase (Decrease) in Stockholders' Equity [Roll Forward] |
|
|
|
|
|
| Issuance of common stock warrants |
7,925
|
|
|
7,925
|
|
| Exercises of stock options (in shares) |
|
14,236
|
|
|
|
| Exercise of stock options |
17
|
|
|
17
|
|
| Stock-based compensation |
471
|
|
|
471
|
|
| Net loss |
(14,905)
|
|
|
|
(14,905)
|
| Ending balance (in shares) at Mar. 31, 2020 |
|
28,810,607
|
29,967
|
|
|
| Ending balance at Mar. 31, 2020 |
$ 53,486
|
$ 29
|
$ (24)
|
230,544
|
(177,063)
|
| Beginning balance (in shares) at Dec. 31, 2020 |
29,441,887
|
29,471,854
|
29,967
|
|
|
| Beginning balance at Dec. 31, 2020 |
$ (25,202)
|
$ 29
|
$ (24)
|
235,516
|
(260,723)
|
| Increase (Decrease) in Stockholders' Equity [Roll Forward] |
|
|
|
|
|
| Issuance of common stock in public offering, net (in shares) |
|
18,400,000
|
|
|
|
| Issuance of common stock in public offering, net |
60,084
|
$ 19
|
|
60,065
|
|
| Exercises of stock options (in shares) |
|
110,146
|
|
|
|
| Exercise of stock options |
217
|
|
|
217
|
|
| Stock-based compensation |
670
|
|
|
670
|
|
| Net loss |
$ (27,358)
|
|
|
|
(27,358)
|
| Ending balance (in shares) at Mar. 31, 2021 |
47,952,033
|
47,982,000
|
29,967
|
|
|
| Ending balance at Mar. 31, 2021 |
$ 8,411
|
$ 48
|
$ (24)
|
$ 296,468
|
$ (288,081)
|