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Restructuring - Narrative (Details) - USD ($) $ in Thousands | 1 Months Ended | 3 Months Ended | 6 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
Apr. 30, 2022 | Dec. 31, 2021 | Jun. 30, 2021 | Apr. 30, 2021 | Dec. 31, 2020 | Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021 | Mar. 31, 2022 | Mar. 31, 2021 | Jun. 30, 2020
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Restructuring recovery |  |  |  |  |  | $ 0 | $ (3) | $ 0 | $ (22) |  |  |
Purchase price | $ 1,800 |  |  | $ 1,500 |  |  |  |  |  |  |  |
Stockholders' equity |  | $ 6,209 | $ 5,603 |  | $ 4,255 | $ 4,171 | $ 5,603 | $ 4,171 | $ 5,603 | $ 3,432 | $ 3,278 | $ 1,714
Warrant liability - modification |  |  |  |  | $ 1,400 |  |  |  |  |  |  |
December 2021 Private Placement |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from sale of common stock and warrants |  | $ 4,000 |  |  |  |  |  |  |  |  |  |
Investor Warrants |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from sale of common stock and warrants |  |  | $ 4,500 |  |  |  |  |  |  |  |  |

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