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v3.23.2

Liquidity and Going Concern - Additional Information (Details) $ / shares in Units, $ in Thousands |  |  |  |  |  | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Apr. 27, 2023 | Apr. 21, 2023 | Apr. 20, 2023 | Nov. 22, 2022 | May 24, 2022 $ / shares | Jun. 30, 2023 USD ($) | Mar. 31, 2023 USD ($) | Jun. 30, 2022 USD ($) | Mar. 31, 2022 USD ($) | Jun. 30, 2023 USD ($) | Jun. 30, 2022 USD ($) | Dec. 31, 2022 USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Net loss |  |  |  |  |  | $ (1,482) | $ (4,805) | $ (5,282) | $ (4,116) | $ (6,287) | $ (9,398) |
Accumulated deficit |  |  |  |  |  | $ (473,472) |  |  |  | (473,472) |  | $ (467,185)
Net cash used in operating activities |  |  |  |  |  |  |  |  |  | $ (8,571) | $ (6,516) |
Closing bid price for common stock had fallen below | $ / shares |  |  |  |  | $ 1.00 |  |  |  |  |  |  |
Consecutive business days |  |  |  |  | 30 days |  |  |  |  |  |  |
Period for regain compliance |  |  |  | 180 days |  |  |  |  |  |  |  |
Regain compliance expiry date |  |  |  | May 22, 2023 |  |  |  |  |  |  |  |
Stock split conversion ratio | 0.06 | 0.06 |  |  |  |  |  |  |  |  |  |
Reverse stock split effective date | May 01, 2023 |  |  |  |  |  |  |  |  |  |  |
Reverse stock split | one-for-fifteen |  |  |  |  |  |  |  |  |  |  |
Maximum [Member] |  |  |  |  |  |  |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Stock split conversion ratio |  |  | 0.06 |  |  |  |  |  |  |  |  |
Reverse stock split |  |  | one-for-fifteen |  |  |  |  |  |  |  |  |
Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Stock split conversion ratio |  |  | 0.33 |  |  |  |  |  |  |  |  |
Reverse stock split |  |  | one-for-three |  |  |  |  |  |  |  |  |

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