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Derivative Liability - Narrative (Details) - Exit Fee derivative - USD ($) $ in Millions | Jun. 30, 2021 | May 31, 2018
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Derivative [Line Items] |  |
Agreed amount for exit fee upon change of control or regulatory approval | $ 1.5 | $ 1.5
Level 3 |  |
Derivative [Line Items] |  |
Fair value analysis, percentage change in probability of occurrence | 10.00% |
Fair value analysis, effect on fair value based on 10% change in probability of occurrence | $ 0.1 |

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