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 |
$ (17,231)
|
|
|
|
|
|
|
|
|
|
|
|
|
Ending Balance at Jun. 30, 2023 |
9,699
|
|
|
|
$ 90
|
|
|
162,772
|
|
|
|
4
|
(153,167)
|
Ending Balance, Shares at Jun. 30, 2023 |
|
|
|
|
21,105,760
|
|
|
|
|
|
|
|
|
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
|
|
|
|
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
|
|
|
|
|
|
|
|
|
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 |
$ (11)
|
|
|
|
|
|
|
|
|
|
|
|
|
Net loss |
(14,955)
|
|
|
|
|
|
|
|
|
|
|
|
|
Ending Balance at Jun. 30, 2024 |
42,285
|
|
|
|
$ 103
|
|
|
222,895
|
|
|
|
(7)
|
(180,706)
|
Ending Balance, Shares at Jun. 30, 2024 |
|
|
|
|
34,341,303
|
|
|
|
|
|
|
|
|
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
|
|
|
|
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
|
|
|
|
|
|
|
|
|