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Note 2 - Discontinued Operations - Summary of Discontinued Operations (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Dec. 31, 2024
Accounts receivable and unbilled revenues, net $ 41   $ 41   $ 0
Total current assets of discontinued operations 41   41   0
Total assets of discontinued operations 41   41   $ 0
Revenues 226 $ 85 338 $ 908  
Cost of revenues 12 (19) 48 822  
Gross margin 214 104 290 86  
Sales and marketing (36) 0 (143) 0  
General and administrative 0 148 0 573  
Total operating expenses (36) 148 (143) 573  
Operating income (loss) 250 (44) 433 (487)  
Other income (expense), net 0 0 0 19  
Loss before provision for income taxes (250) 44 (433) 468  
Net income (loss) 250 (44) 433 (468)  
Depreciation and amortization 0 1 0 19  
Amortization of operating lease ROU assets 0 18 0 52  
Inventory impairment loss 0 287 0 287  
Purchase of property and equipment 0 0 0 (37)  
Proceeds from sale of property and equipment 0 0 0 190  
Product [Member]          
Revenues 226 85 338 908  
Cost of revenues $ 12 $ (19) $ 48 $ 822