Other Income (Narrative) (Details) - USD ($)	3 Months Ended			6 Months Ended		12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Other Income [Line Items]
Gain on insurance settlement			$ 0	$ 119,000	$ 2,000
Des Moines, Iowa market
Other Income [Line Items]
Cash proceeds from insurance settlement		$ 445,000
Gain on insurance settlement		$ 445,000
Other Nonoperating Income (Expense) [Member]
Other Income [Line Items]
Reimbursements received	$ 115,000					$ 116,000