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Debt - Line of credit (Details) - Revolving Line of Credit
$ in Millions
Apr. 05, 2021
USD ($)
Debt Instrument [Line Items]  
Aggregate amount $ 5.0
Fees on daily unused portion 0.25%
Outstanding borrowings $ 3.9
Prime rate  
Debt Instrument [Line Items]  
Basis spread on interest rate 0.00%