Consolidated Statements of Stockholder's Equity (Unaudited) - USD ($) $ in Thousands |
Total |
May 2023 Private Placement [Member] |
November 2022 Private Placement [Member] |
Common stock [Member] |
Common stock [Member]
May 2023 Private Placement [Member]
|
Additional paid-in capital [Member] |
Additional paid-in capital [Member]
May 2023 Private Placement [Member]
|
Additional paid-in capital [Member]
November 2022 Private Placement [Member]
|
Accumulated other comprehensive income (loss) [Member] |
Accumulated deficit [Member] |
Beginning Balance at Dec. 31, 2021 |
$ 28,042
|
|
|
$ 79
|
|
$ 121,545
|
|
|
$ 4
|
$ (93,586)
|
Beginning Balance, Shares at Dec. 31, 2021 |
|
|
|
9,453,542
|
|
|
|
|
|
|
Stock-based compensation expense |
823
|
|
|
|
|
823
|
|
|
|
|
Shares issued on exercise of warrants |
24
|
|
|
|
|
24
|
|
|
|
|
Shares issued on exercise of warrants, Shares |
|
|
|
3,709
|
|
|
|
|
|
|
Shares issued from purchase agreement with Virtu |
91
|
|
|
|
|
91
|
|
|
|
|
Shares issued from purchase agreement with Virtu, Shares |
|
|
|
12,742
|
|
|
|
|
|
|
Shares issued |
26
|
|
|
|
|
26
|
|
|
|
|
Shares issued, Shares |
|
|
|
3,584
|
|
|
|
|
|
|
Net loss |
(7,573)
|
|
|
|
|
|
|
|
|
(7,573)
|
Ending Balance at Mar. 31, 2022 |
21,433
|
|
|
$ 79
|
|
122,509
|
|
|
4
|
(101,159)
|
Ending Balance, Shares at Mar. 31, 2022 |
|
|
|
9,473,577
|
|
|
|
|
|
|
Beginning Balance at Dec. 31, 2021 |
$ 28,042
|
|
|
$ 79
|
|
121,545
|
|
|
4
|
(93,586)
|
Beginning Balance, Shares at Dec. 31, 2021 |
|
|
|
9,453,542
|
|
|
|
|
|
|
Restricted stock unit settlements, Shares |
26,625
|
|
|
|
|
|
|
|
|
|
Net loss |
$ (31,118)
|
|
|
|
|
|
|
|
|
|
Ending Balance at Sep. 30, 2022 |
1,044
|
|
|
$ 79
|
|
125,665
|
|
|
4
|
(124,704)
|
Ending Balance, Shares at Sep. 30, 2022 |
|
|
|
9,710,747
|
|
|
|
|
|
|
Beginning Balance at Mar. 31, 2022 |
21,433
|
|
|
$ 79
|
|
122,509
|
|
|
4
|
(101,159)
|
Beginning Balance, Shares at Mar. 31, 2022 |
|
|
|
9,473,577
|
|
|
|
|
|
|
Stock-based compensation expense |
840
|
|
|
|
|
840
|
|
|
|
|
Shares issued from purchase agreement with Virtu |
1,408
|
|
|
|
|
1,408
|
|
|
|
|
Shares issued from purchase agreement with Virtu, Shares |
|
|
|
187,258
|
|
|
|
|
|
|
Restricted stock unit settlements, Shares |
|
|
|
26,625
|
|
|
|
|
|
|
Restricted stock unit settlements withheld and retired to treasury |
(47)
|
|
|
|
|
(47)
|
|
|
|
|
Restricted stock unit settlements withheld and retired to treasury, Shares |
|
|
|
(5,605)
|
|
|
|
|
|
|
Net loss |
(10,468)
|
|
|
|
|
|
|
|
|
(10,468)
|
Ending Balance at Jun. 30, 2022 |
13,166
|
|
|
$ 79
|
|
124,710
|
|
|
4
|
(111,627)
|
Ending Balance, Shares at Jun. 30, 2022 |
|
|
|
9,681,855
|
|
|
|
|
|
|
Stock-based compensation expense |
$ 829
|
|
|
|
|
829
|
|
|
|
|
Restricted stock unit settlements, Shares |
26,625
|
|
|
|
|
|
|
|
|
|
Shares issued under employee share purchase plan |
$ 126
|
|
|
|
|
126
|
|
|
|
|
Shares issued under employee share purchase plan, Shares |
|
|
|
28,892
|
|
|
|
|
|
|
Net loss |
(13,077)
|
|
|
|
|
|
|
|
|
(13,077)
|
Ending Balance at Sep. 30, 2022 |
1,044
|
|
|
$ 79
|
|
125,665
|
|
|
4
|
(124,704)
|
Ending Balance, Shares at Sep. 30, 2022 |
|
|
|
9,710,747
|
|
|
|
|
|
|
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 |
139,750
|
|
|
|
|
|
|
|
|
|
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
|
|
|
|
|
|
|