Note 14 - Revenue - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Revenue from contract with customer	$ 104	$ 188	$ 156	$ 1,395
Transferred at Point in Time [Member]
Revenue from contract with customer	65	56	91	426
Transferred over Time [Member]
Revenue from contract with customer	39	132	65	969
UNITED STATES
Revenue from contract with customer	39	164	80	1,154
Europe [Member]
Revenue from contract with customer	65	24	76	184
Asia [Member]
Revenue from contract with customer	$ 0	$ 0	$ 0	$ 57

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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+ Details