XML 54 R40.htm IDEA: XBRL DOCUMENT v3.20.4
Line Of Credit (Details) - The Credit Agreement - Line of Credit
12 Months Ended
Dec. 31, 2020
USD ($)
Line of Credit Facility [Line Items]  
Line of Credit Facility, Maximum Borrowing Capacity $ 25,000,000.0
Debt Instrument, Unused Borrowing Capacity Fee Rate 0.10%
Long-term Line of Credit, Noncurrent $ 0
London Interbank Offered Rate (LIBOR)  
Line of Credit Facility [Line Items]  
Debt Instrument, Basis Spread on Variable Rate 1.00%