XML 52 R42.htm IDEA: XBRL DOCUMENT v3.21.2
Commitments and Contingencies - Additional Information (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Dec. 31, 2020
Commitments and Contingencies Disclosure [Abstract]          
Deferred rent liability $ 400,000   $ 400,000   $ 400,000
Rental expense 200,000 $ 200,000 400,000 $ 300,000  
Contingency reserves for litigation liabilities $ 0   $ 0   $ 0