Credit Arrangement (Details) - USD ($)	1 Months Ended			12 Months Ended
	Oct. 31, 2022	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Credit Agreement [Abstract]
Proceeds from borrowings				$ 0	$ 0	$ 43,800,000
Repayment of borrowings				0	0	43,800,000
Cash paid for interest				127,000	$ 126,000	365,000
Credit Agreement
Credit Agreement [Abstract]
Line of credit facility, maximum borrowing capacity	$ 80,000,000
Debt instrument, maturity date	Oct. 24, 2027
Covenant limit for unused availability to pay dividends	$ 12,500,000
Proceeds from borrowings			$ 43,800,000
Repayment of borrowings		$ 43,800,000
Weighted average interest rate	2.37%
Cash paid for interest						$ 400,000
Borrowing base				124,700,000
Outstanding letters of credit				0
Net availability				$ 80,000,000
Credit Agreement | Euro Dollar LIBOR Rate
Credit Agreement [Abstract]
Term of variable interest rate	3 months
Basis spread on variable rate	1.25%