Consolidated Statements of Stockholder's Equity (Unaudited) - USD ($) $ in Thousands |
Total |
February 2024 Registered Direct Offering [Member] |
November 2022 Private Placement [Member] |
May 2023 Registered Direct Offering [Member] |
Common Stock [Member] |
Common Stock [Member]
February 2024 Registered Direct Offering [Member]
|
Common Stock [Member]
May 2023 Registered Direct Offering [Member]
|
Additional paid-in capital [Member] |
Additional paid-in capital [Member]
February 2024 Registered Direct Offering [Member]
|
Additional paid-in capital [Member]
November 2022 Private Placement [Member]
|
Additional paid-in capital [Member]
May 2023 Registered Direct Offering [Member]
|
Accumulated other comprehensive income (loss) [Member] |
Accumulated deficit [Member] |
Beginning Balance at Dec. 31, 2022 |
$ 8,303
|
|
|
|
$ 87
|
|
|
$ 144,148
|
|
|
|
$ 4
|
$ (135,936)
|
Beginning Balance, Shares at Dec. 31, 2022 |
|
|
|
|
17,897,029
|
|
|
|
|
|
|
|
|
Stock-based compensation expense |
1,085
|
|
|
|
|
|
|
1,085
|
|
|
|
|
|
Shares issued on exercise of warrants |
77
|
|
|
|
|
|
|
77
|
|
|
|
|
|
Shares issued on exercise of warrants, Shares |
|
|
|
|
33,333
|
|
|
|
|
|
|
|
|
Financing costs |
|
|
$ (30)
|
|
|
|
|
|
|
$ (30)
|
|
|
|
Net loss |
(8,992)
|
|
|
|
|
|
|
|
|
|
|
|
(8,992)
|
Ending Balance at Mar. 31, 2023 |
443
|
|
|
|
$ 87
|
|
|
145,280
|
|
|
|
4
|
(144,928)
|
Ending Balance, Shares at Mar. 31, 2023 |
|
|
|
|
17,930,362
|
|
|
|
|
|
|
|
|
Beginning Balance at Dec. 31, 2022 |
$ 8,303
|
|
|
|
$ 87
|
|
|
144,148
|
|
|
|
4
|
(135,936)
|
Beginning Balance, Shares at Dec. 31, 2022 |
|
|
|
|
17,897,029
|
|
|
|
|
|
|
|
|
Restricted stock unit settlements, Shares |
139,750
|
|
|
|
|
|
|
|
|
|
|
|
|
Net loss |
$ (24,339)
|
|
|
|
|
|
|
|
|
|
|
|
|
Ending Balance at Sep. 30, 2023 |
4,038
|
|
|
|
$ 90
|
|
|
164,219
|
|
|
|
4
|
(160,275)
|
Ending Balance, Shares at Sep. 30, 2023 |
|
|
|
|
21,165,760
|
|
|
|
|
|
|
|
|
Beginning Balance at Mar. 31, 2023 |
443
|
|
|
|
$ 87
|
|
|
145,280
|
|
|
|
4
|
(144,928)
|
Beginning Balance, Shares at Mar. 31, 2023 |
|
|
|
|
17,930,362
|
|
|
|
|
|
|
|
|
Stock-based compensation expense |
1,190
|
|
|
|
|
|
|
1,190
|
|
|
|
|
|
Shares issued on exercise of warrants |
150
|
|
|
|
|
|
|
150
|
|
|
|
|
|
Shares issued on exercise of warrants, Shares |
|
|
|
|
65,000
|
|
|
|
|
|
|
|
|
Shares issued |
|
|
|
$ 15,301
|
|
|
$ 3
|
|
|
|
$ 15,298
|
|
|
Shares issued, Shares |
|
|
|
|
|
|
3,000,000
|
|
|
|
|
|
|
SVB convertible debt refinancing discount |
1,074
|
|
|
|
|
|
|
1,074
|
|
|
|
|
|
Restricted stock unit settlements, Shares |
|
|
|
|
139,750
|
|
|
|
|
|
|
|
|
Restricted stock unit settlements withheld and retired to treasury |
(220)
|
|
|
|
|
|
|
(220)
|
|
|
|
|
|
Restricted stock unit settlements withheld and retired to treasury, Shares |
|
|
|
|
(29,352)
|
|
|
|
|
|
|
|
|
Net loss |
(8,239)
|
|
|
|
|
|
|
|
|
|
|
|
(8,239)
|
Ending Balance at Jun. 30, 2023 |
9,699
|
|
|
|
$ 90
|
|
|
162,772
|
|
|
|
4
|
(153,167)
|
Ending Balance, Shares at Jun. 30, 2023 |
|
|
|
|
21,105,760
|
|
|
|
|
|
|
|
|
Stock-based compensation expense |
1,174
|
|
|
|
|
|
|
1,174
|
|
|
|
|
|
Shares issued |
$ 273
|
|
|
|
|
|
|
273
|
|
|
|
|
|
Shares issued, Shares |
|
|
|
|
60,000
|
|
|
|
|
|
|
|
|
Restricted stock unit settlements, Shares |
0
|
|
|
|
|
|
|
|
|
|
|
|
|
Net loss |
$ (7,108)
|
|
|
|
|
|
|
|
|
|
|
|
(7,108)
|
Ending Balance at Sep. 30, 2023 |
4,038
|
|
|
|
$ 90
|
|
|
164,219
|
|
|
|
4
|
(160,275)
|
Ending Balance, Shares at Sep. 30, 2023 |
|
|
|
|
21,165,760
|
|
|
|
|
|
|
|
|
Beginning Balance at Dec. 31, 2023 |
(1,448)
|
|
|
|
$ 90
|
|
|
164,209
|
|
|
|
4
|
(165,751)
|
Beginning Balance, Shares at Dec. 31, 2023 |
|
|
|
|
21,165,760
|
|
|
|
|
|
|
|
|
Stock-based compensation expense |
1,288
|
|
|
|
|
|
|
1,288
|
|
|
|
|
|
Shares issued |
|
$ 56,110
|
|
|
|
$ 13
|
|
|
$ 56,097
|
|
|
|
|
Shares issued, Shares |
|
|
|
|
|
13,086,151
|
|
|
|
|
|
|
|
Net loss |
(6,494)
|
|
|
|
|
|
|
|
|
|
|
|
(6,494)
|
Ending Balance at Mar. 31, 2024 |
49,456
|
|
|
|
$ 103
|
|
|
221,594
|
|
|
|
4
|
(172,245)
|
Ending Balance, Shares at Mar. 31, 2024 |
|
|
|
|
34,251,911
|
|
|
|
|
|
|
|
|
Beginning Balance at Dec. 31, 2023 |
$ (1,448)
|
|
|
|
$ 90
|
|
|
164,209
|
|
|
|
4
|
(165,751)
|
Beginning Balance, Shares at Dec. 31, 2023 |
|
|
|
|
21,165,760
|
|
|
|
|
|
|
|
|
Restricted stock unit settlements, Shares |
113,125
|
|
|
|
|
|
|
|
|
|
|
|
|
Other comprehensive income |
$ 71
|
|
|
|
|
|
|
|
|
|
|
|
|
Net loss |
(27,467)
|
|
|
|
|
|
|
|
|
|
|
|
|
Ending Balance at Sep. 30, 2024 |
31,378
|
|
|
|
$ 103
|
|
|
224,418
|
|
|
|
75
|
(193,218)
|
Ending Balance, Shares at Sep. 30, 2024 |
|
|
|
|
34,389,946
|
|
|
|
|
|
|
|
|
Beginning Balance at Mar. 31, 2024 |
49,456
|
|
|
|
$ 103
|
|
|
221,594
|
|
|
|
4
|
(172,245)
|
Beginning Balance, Shares at Mar. 31, 2024 |
|
|
|
|
34,251,911
|
|
|
|
|
|
|
|
|
Stock-based compensation expense |
1,454
|
|
|
|
|
|
|
1,454
|
|
|
|
|
|
Financing costs |
|
(39)
|
|
|
|
|
|
|
(39)
|
|
|
|
|
Restricted stock unit settlements, Shares |
|
|
|
|
113,125
|
|
|
|
|
|
|
|
|
Restricted stock unit settlements withheld and retired to treasury |
(114)
|
|
|
|
|
|
|
(114)
|
|
|
|
|
|
Restricted stock unit settlements withheld and retired to treasury, Shares |
|
|
|
|
(23,733)
|
|
|
|
|
|
|
|
|
Other comprehensive income |
(11)
|
|
|
|
|
|
|
|
|
|
|
(11)
|
|
Net loss |
(8,461)
|
|
|
|
|
|
|
|
|
|
|
|
(8,461)
|
Ending Balance at Jun. 30, 2024 |
42,285
|
|
|
|
$ 103
|
|
|
222,895
|
|
|
|
(7)
|
(180,706)
|
Ending Balance, Shares at Jun. 30, 2024 |
|
|
|
|
34,341,303
|
|
|
|
|
|
|
|
|
Stock-based compensation expense |
1,340
|
|
|
|
|
|
|
1,340
|
|
|
|
|
|
Financing costs |
|
$ 5
|
|
|
|
|
|
|
$ 5
|
|
|
|
|
Shares issued under employee share purchase plan |
$ 178
|
|
|
|
|
|
|
178
|
|
|
|
|
|
Shares issued under employee share purchase plan, Shares |
|
|
|
|
48,643
|
|
|
|
|
|
|
|
|
Restricted stock unit settlements, Shares |
0
|
|
|
|
|
|
|
|
|
|
|
|
|
Other comprehensive income |
$ 82
|
|
|
|
|
|
|
|
|
|
|
82
|
|
Net loss |
(12,512)
|
|
|
|
|
|
|
|
|
|
|
|
(12,512)
|
Ending Balance at Sep. 30, 2024 |
$ 31,378
|
|
|
|
$ 103
|
|
|
$ 224,418
|
|
|
|
$ 75
|
$ (193,218)
|
Ending Balance, Shares at Sep. 30, 2024 |
|
|
|
|
34,389,946
|
|
|
|
|
|
|
|
|