| Note 6 - Balance Sheet Detail - Schedule of Accounts Receivable (Details) - USD ($) $ in Thousands | Dec. 31, 2024 | Dec. 31, 2023 | 
|---|---|---|
| Total amount due from customer | $ 2,459 | $ 1,637 | 
| Less: unamortized discount | (102) | (12) | 
| Less: current portion included in accounts receivable | (1,183) | (828) | 
| Accounts Receivable, after Allowance for Credit Loss, Noncurrent | $ 1,174 | $ 797 | 
| X | ||||||||||
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- Definition Represents the current portion of noncurrent accounts receivable. No definition available. 
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| X | ||||||||||
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- Definition Represents the amount of discount on accounts receivable classified as noncurrent. No definition available. 
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| X | ||||||||||
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- Definition Amount, before allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as noncurrent. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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| X | ||||||||||
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- Definition Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as noncurrent. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef 
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