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Line of Credit (Details) - The Credit Agreement - Line of Credit
3 Months Ended
Mar. 31, 2020
USD ($)
Line of Credit Facility [Line Items]  
Maximum borrowing amount $ 25,000,000.0
Commitment fee rate on unused borrowings 0.10%
Borrowing under line of credit facility $ 0
London Interbank Offered Rate (LIBOR)  
Line of Credit Facility [Line Items]  
Line of credit facility, interest rate description 1.00%