Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Derivative Contingently Issuable Warrant liabilities (Details)

v3.20.2
Fair Value Measurements - Derivative Contingently Issuable Warrant liabilities (Details) - Caelum Warrant Liabilities [Member]
$ in Thousands
6 Months Ended
Jun. 30, 2020
USD ($)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]  
Beginning balance $ 27
Change in fair value 386
Ending balance $ 413