Other Income (Narrative) (Details) - USD ($)	3 Months Ended						12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022	Sep. 30, 2022	Mar. 31, 2022	Sep. 30, 2021	Mar. 31, 2021	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Other Income [Line Items]
Cash proceeds from insurance settlement								$ 534,000	$ 589,000
Gain on insurance settlement	$ 119,000	$ 616,000	$ 34,000	$ 2,000			$ 119,000	652,000	634,000
Des Moines, Iowa market
Other Income [Line Items]
Cash proceeds from insurance settlement		445,000			$ 290,000	$ 250,000
Gain on insurance settlement		$ 445,000			$ 290,000	$ 250,000			$ 540,000
Other (income) expense, net
Other Income [Line Items]
Reimbursements received	$ 115,000							$ 116,000