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Debt - Term Notes, Additional Information (Details) - LSA - USD ($)
$ in Thousands
1 Months Ended 12 Months Ended
Jan. 31, 2013
Dec. 31, 2020
Debt Instrument [Line Items]    
Maximum borrowings $ 11,000  
Effective interest rate 5.56% 6.00%
Number of warrants issued (in shares) 494,833  
Interest expense   $ 86
Aggregate principal payments   $ 3,300
Prime Rate    
Debt Instrument [Line Items]    
Interest rate greater of prime plus 1.81%