Quarterly report [Sections 13 or 15(d)]

Note 1 - Organization (Details Textual)

v3.26.1
Note 1 - Organization (Details Textual)
 3 Months Ended
Aug. 04, 2025
Mar. 31, 2026
USD ($)
shares
Mar. 31, 2025
USD ($)
shares
Dec. 31, 2025
USD ($)
Oct. 16, 2025
USD ($)
$ / shares
May 15, 2025
USD ($)
Aug. 22, 2024
USD ($)
Net Income (Loss) Attributable to Parent   $ (3,954,000) $ (8,315,000)        
Cash Provided by (Used in) Operating Activity, Including Discontinued Operation   (3,844,000) (2,753,000)        
Cash and Cash Equivalent   6,816,000   $ 10,810,000      
Working Capital   7,479,000          
Retained Earnings (Accumulated Deficit)   (274,370,000)   (270,416,000)      
Gain Loss on Sale of Property, Plant and Equipment, Excluding Amount in Cost of Good Sold   $ (0) $ (5,247,000)        
Common Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares         $ 0.001    
ATM [Member]              
Equity Offering, Maximum Amount       $ 50,000,000 $ 30,000,000   $ 30,000,000
Stock Issued During Period, Shares, New Issues (in shares) | shares   198,780 59,648        
Proceeds from Issuance of Common Stock   $ 1,295,000 $ 1,214,000        
Equity Offering, Remaining Availability   $ 48,600,000          
ELOC [Member]              
Equity Offering, Maximum Amount           $ 10,000,000  
ELOC [Member] | Lincoln [Member]              
Equity Committed, Issuable, Maximum Value           $ 10,000,000  
Reverse Stock Split [Member]              
Stockholders' Equity Note, Stock Split, Conversion Ratio 10