Amount of cash inflow for proceeds from settlement of insurance claim, classified as investing activities. Excludes insurance settlement classified as operating activities.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 21B
-URI https://asc.fasb.org/extlink&oid=126954810&loc=SL94080549-108585

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 12
-URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3179-108585

Name:	us-gaap_ProceedsFromInsuranceSettlementInvestingActivities
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Other Income (Narrative) (Details) - USD ($)	3 Months Ended			6 Months Ended		12 Months Ended
Other Income (Narrative) (Details) - USD ($)	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Other Income [Line Items]
Proceeds from Insurance Settlement, Investing Activities					$ 272,000
Other income (expense)		$ 31,000		$ 2,000	$ 303,000
Tower in Des Moines Iowa [Member]
Other Income [Line Items]
Proceeds from Insurance Settlement, Investing Activities	$ 290,000		$ 250,000
Other income (expense)	$ 290,000		$ 250,000			$ 540,000