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v3.23.2

NATURE OF OPERATIONS (Details) |  |  |  | 3 Months Ended | 6 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Feb. 10, 2023 | Mar. 31, 2022 USD ($) | Mar. 15, 2022 USD ($) | Jun. 30, 2023 USD ($) | Jun. 30, 2022 USD ($) | Jun. 30, 2023 USD ($) segment | Jun. 30, 2022 USD ($) | Jan. 12, 2023 USD ($) | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($)
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items] |  |  |  |  |  |  |  |  |  |
Number of reportable segments | segment |  |  |  |  |  | 1 |  |  |  |
Reverse stock split ratio | 0.0556 |  |  |  |  |  |  |  |  |
Net loss |  |  |  | $ (10,058,000) | $ (8,476,000) | $ (15,680,000) | $ (3,806,000) |  |  |
Cash used in operations |  |  |  |  |  | (15,052,000) | (17,264,000) |  |  |
Cash and investments |  |  |  | 20,701,000 | $ 42,814,000 | 20,701,000 | $ 42,814,000 |  | $ 30,975,000 | $ 42,855,000
Accumulated deficit |  |  |  | (678,564,000) |  | (678,564,000) |  |  | (662,735,000) |
Additional paid-in capital |  |  |  | 695,836,000 |  | 695,836,000 |  |  | $ 693,937,000 |
Debt outstanding |  |  |  | 0 |  | 0 |  |  |  |
Sale of stock, public float threshold |  |  |  | $ 75,000,000 |  | $ 75,000,000 |  |  |  |
Lincoln Park Equity Purchase Agreement |  |  |  |  |  |  |  |  |  |
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items] |  |  |  |  |  |  |  |  |  |
Consideration receivable on transaction |  | $ 30,000,000 | $ 30,000,000 |  |  |  |  |  |  |
Term of equity purchase agreement |  | 36 months | 36 months |  |  |  |  |  |  |
MST Franchise | Discontinued Operations, Disposed of by Sale |  |  |  |  |  |  |  |  |  |
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items] |  |  |  |  |  |  |  |  |  |
Additional paid-in capital |  |  |  |  |  |  |  | $ 5,000,000 |  |

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