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Note 3 - Revenues - Deferred Revenue (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024
Deferred Revenue, Current	$ 2,879		$ 3,806
Deferred Revenue, Change, Current	$ (927)
Deferred Revenue, % Change, Current	(24.00%)
Deferred Revenue	$ 3,167		3,806
Deferred Revenue, Change	$ (639)	$ (819)
Deferred Revenue, % Change	(17.00%)
Service, Maintenance, and Warranty Contracts [Member]
Deferred Revenue, Current	$ 1,414		1,560
Deferred Revenue, Change, Current	$ (146)
Deferred Revenue, % Change, Current	(9.00%)
Deferred Revenue, Noncurrent	$ 288		0
Deferred Revenue, Change, Noncurrent	$ 288
Deferred Revenue, % Change, Noncurrent	100.00%
Installation and Training [Member]
Deferred Revenue, Current	$ 477		806
Deferred Revenue, Change, Current	$ (329)
Deferred Revenue, % Change, Current	(41.00%)
Customer Advances [Member]
Deferred Revenue, Current	$ 988		$ 1,440
Deferred Revenue, Change, Current	$ (452)
Deferred Revenue, % Change, Current	(31.00%)

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