Note 1 - General Information - Revenue by Geographic Area (Details) - USD ($) $ in Thousands	3 Months Ended
Sep. 30, 2025	Sep. 30, 2024
Revenue	$ 297	$ 34
UNITED STATES
Revenue	256	0
Non-US [Member]
Revenue	$ 41	$ 34

Amount, including 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