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Covid-19 (Details) - USD ($)
$ in Thousands
 1 Months Ended 3 Months Ended 9 Months Ended
Apr. 16, 2020
Apr. 30, 2020
Sep. 30, 2020
Mar. 31, 2020
Sep. 30, 2021
Sep. 30, 2020
Restructuring Cost and Reserve [Line Items]            
Coronavirus, Aid, Relief, And Economic Securities (CARES) Act, deferred tax assets, valuation allowance       $ 100    
Coronavirus, Aid, Relief, And Economic Securities (CARES) Act, deferred tax assets, income tax benefit       $ 100    
Proceeds from government assistance   $ 700 $ 0     $ 700
Proceeds from Paycheck Protection Program loan         $ 0 $ 2,865
Paycheck Protection Program, CARES Act            
Restructuring Cost and Reserve [Line Items]            
Proceeds from Paycheck Protection Program loan $ 2,900