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THE COMPANY AND BASIS OF PRESENTATION - Corrected Consolidated Statement of Cash Flows (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Sep. 30, 2023 | Jun. 30, 2023 | Mar. 31, 2023 | Sep. 30, 2022 | Jun. 30, 2022 | Mar. 31, 2022 | Jun. 30, 2023 | Jun. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022 | Dec. 31, 2023 | Dec. 31, 2022
Operating activities: |  |  |  |  |  |  |  |  |  |  |  |
Net loss | $ (9,107) | $ (13,624) | $ 3,013 | $ 14,246 | $ (15,759) | $ (18,474) | $ (10,611) | $ (34,233) | $ (19,718) | $ (19,987) | $ (22,931) | $ (33,584)
Adjustments to reconcile net loss to net cash used in operating activities: |  |  |  |  |  |  |  |  |  |  |  |
Non-cash operating lease expense |  |  | 262 |  |  | 234 | 639 | 476 | 895 | 724 | 1,158 | 981
Changes in assets and liabilities: |  |  |  |  |  |  |  |  |  |  |  |
Accrued indirect tax liabilities |  |  | 261 |  |  | 353 | 1,897 | 2,993 | 3,155 | 3,725 |  | 3,945
Contract liabilities |  |  | 36 |  |  | (1,004) | (2,613) | (2,412) | (3,956) | 7,154 | (5,799) | 2,646
Operating lease liabilities |  |  | (290) |  |  | (252) | (595) | (512) | (781) | (778) | $ (973) | (1,052)
As Previously Reported |  |  |  |  |  |  |  |  |  |  |  |
Operating activities: |  |  |  |  |  |  |  |  |  |  |  |
Net loss | (8,172) | (12,357) | 3,209 | 14,978 | (13,119) | (18,281) | (9,148) | (31,400) | (17,320) | (16,422) |  | (29,799)
Adjustments to reconcile net loss to net cash used in operating activities: |  |  |  |  |  |  |  |  |  |  |  |
Non-cash operating lease expense |  |  | 288 |  |  | 258 | 664 | 523 | 921 | 796 |  | 1,082
Changes in assets and liabilities: |  |  |  |  |  |  |  |  |  |  |  |
Accrued indirect tax liabilities |  |  | 0 |  |  | 0 | 0 | 0 | 0 | 0 |  | 0
Contract liabilities |  |  | (142) |  |  | (844) | (2,613) | (2,252) | (3,956) | 7,314 |  | 2,806
Operating lease liabilities |  |  | (316) |  |  | (276) | (620) | (559) | (807) | (850) |  | (1,153)
Restatement Adjustment |  |  |  |  |  |  |  |  |  |  |  |
Operating activities: |  |  |  |  |  |  |  |  |  |  |  |
Net loss | $ (935) | $ (1,267) | (196) | $ (732) | $ (2,640) | (193) | (1,463) | (2,833) | (2,398) | (3,565) |  | (3,785)
Adjustments to reconcile net loss to net cash used in operating activities: |  |  |  |  |  |  |  |  |  |  |  |
Non-cash operating lease expense |  |  | (26) |  |  | (24) | (25) | (47) | (26) | (72) |  | (101)
Changes in assets and liabilities: |  |  |  |  |  |  |  |  |  |  |  |
Accrued indirect tax liabilities |  |  | 261 |  |  | 353 | 1,897 | 2,993 | 3,155 | 3,725 |  | 3,945
Contract liabilities |  |  | 178 |  |  | (160) | 0 | (160) | 0 | (160) |  | (160)
Operating lease liabilities |  |  | $ 26 |  |  | $ 24 | $ 25 | $ 47 | $ 26 | $ 72 |  | $ 101

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