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Short-Term Borrowings (Details) - Revolving Credit Facility
6 Months Ended
Jun. 30, 2021
USD ($)
Short-term Debt [Line Items]  
Line of Credit Facility, Amount, Total $ 30,000,000
Line of Credit Facility, Expiration Date Nov. 04, 2021
Line of credit current $ 0
London Interbank Offered Rate (LIBOR)  
Short-term Debt [Line Items]  
Debt Instrument, Basis Spread on Variable Rate 1.35%