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Note 2 - Summary of Significant Accounting Policies (Details Textual)
$ in Thousands
3 Months Ended 9 Months Ended
Feb. 20, 2026
Sep. 30, 2026
USD ($)
Sep. 30, 2025
USD ($)
Sep. 30, 2026
USD ($)
Sep. 30, 2025
USD ($)
Long-Lived Asset, Held and Used, Impairment Loss   $ 0 $ 87 $ 0 $ 676
Tangible Asset Impairment Charges     3   33
Operating Lease, Impairment Loss   $ 0 $ 84 $ 0 $ 643
Reverse Stock Split [Member]          
Stockholders' Equity Note, Stock Split, Conversion Ratio 5     5  
SKY Tokens [Member]          
Crypto Asset, Percent of Total Supply   10.00%   10.00%  
SKY Tokens [Member] | Product Concentration Risk [Member] | Assets, Total [Member]          
Concentration Risk, Percentage   96.00%