Note 2 - Summary of Significant Accounting Policies (Details Textual) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2022
Inventory Write-down	$ 176	$ 135
Deferred Grant Proceeds	298
City of Rochester and State of New York [Member]
Contingent Liability, Repayment of State and Local Grant Funds Received			$ 550
Covenant, Future Amount Receivable	123		$ 87
Electronic Test [Member]
Accounts Receivable, Allowance for Credit Loss, Writeoff	$ 48