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Organization and Basis of Presentation - Additional Information (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Sep. 30, 2020
Dec. 31, 2019
Sep. 30, 2019
Line Of Credit Facility [Line Items]        
Total available liquidity $ 18,000      
Cash and cash equivalents 2,580 $ 6,050 $ 2,554 $ 4,529
Revolving Credit Facility [Member]        
Line Of Credit Facility [Line Items]        
Unused borrowing capacity $ 15,400