Note 14 - Leases (Details Textual) - USD ($)	3 Months Ended	6 Months Ended
Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024
Operating Lease, Right-of-Use Asset	$ 5,488,000		$ 5,488,000		$ 3,429,000
Operating Lease, Liability	5,939,000		5,939,000		$ 3,862,000
Operating Lease, Expense	95,000	$ 86,000	191,000	$ 173,000
Main Office Building in Amesbury, Massachusetts [Member]
Sale and Leaseback Transaction, Gain (Loss), Net	745,000
Operating Lease, Right-of-Use Asset	2,100,000		2,100,000
Operating Lease, Liability	$ 2,100,000		$ 2,100,000

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
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Present value of lessee's discounted obligation for lease payments from operating lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Amount of lessee's right to use underlying asset under operating lease.

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Amount of gain (loss) on sale and leaseback transaction from transfer of asset accounted for as sale.

+ References

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