Note 10 - Related Party Transaction (Details Textual) - USD ($)	12 Months Ended
Dec. 31, 2024	Dec. 31, 2023
Operating Lease, Expense	$ 1,384,000	$ 1,339,000
ISC Properties LLC [Member]
Related Party Ownership Percentage	100.00%
Operating Lease, Expense	$ 380,000	$ 357,000

Amount of operating lease expense. Excludes sublease income.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 4
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479041/842-20-45-4

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