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Note 3 - Revenues - Deferred Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2024
Deferred Revenue, Current	$ 3,427		$ 3,806
Deferred Revenue, Change, Current	$ (379)
Deferred Revenue, % Change, Current	(10.00%)
Deferred Revenue	$ 3,709		3,806
Deferred Revenue, Change	$ (97)	$ (120)
Deferred Revenue, % Change	(3.00%)
Service, Maintenance, and Warranty Contracts [Member]
Deferred Revenue, Current	$ 1,681		1,560
Deferred Revenue, Change, Current	$ 121
Deferred Revenue, % Change, Current	8.00%
Deferred Revenue, Noncurrent	$ 282		0
Deferred Revenue, Change, Noncurrent	$ 282
Deferred Revenue, % Change, Noncurrent	100.00%
Installation and Training [Member]
Deferred Revenue, Current	$ 605		806
Deferred Revenue, Change, Current	$ (201)
Deferred Revenue, % Change, Current	(25.00%)
Customer Advances [Member]
Deferred Revenue, Current	$ 1,141		$ 1,440
Deferred Revenue, Change, Current	$ (299)
Deferred Revenue, % Change, Current	(21.00%)

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