Annual report [Section 13 and 15(d), not S-K Item 405]

Note 1 - Organization and Operations (Details Textual)

v3.26.1
Note 1 - Organization and Operations (Details Textual) - USD ($)
 12 Months Ended
Oct. 16, 2025
Dec. 31, 2025
Dec. 31, 2024
May 15, 2025
Aug. 22, 2024
Net Income (Loss) Attributable to Parent   $ (22,646,000) $ (24,555,000)    
Cash Provided by (Used in) Operating Activity, Including Discontinued Operation   (10,253,000) (13,632,000)    
Cash and Cash Equivalent   10,810,000 4,079,000    
Working Capital   8,977,000      
Retained Earnings (Accumulated Deficit)   (270,416,000) (247,770,000)    
Gain Loss on Sale of Property, Plant and Equipment, Excluding Amount in Cost of Good Sold   $ (9,114,000) $ (3,080,000)    
Common Stock, Par or Stated Value Per Share (in dollars per share) $ 0.001 $ 0.001 $ 0.001    
Private Placement [Member]          
Proceeds from Issuance or Sale of Equity $ 11,939,000        
ATM [Member]          
Equity Offering, Maximum Amount $ 30,000,000 $ 50,000,000     $ 30,000,000
Stock Issued During Period, Shares, New Issues (in shares)   836,219 119,503    
Proceeds from Issuance of Common Stock   $ 5,931,000 $ 5,014,000    
ELOC [Member]          
Equity Offering, Maximum Amount       $ 10,000,000  
Proceeds from Issuance of Common Stock   $ 903,000 $ 0    
ELOC [Member] | Lincoln [Member]          
Stock Issued During Period, Shares, New Issues (in shares)   177,283      
Equity Committed, Issuable, Maximum Value       $ 10,000,000  
Equity Offering, Amount Sold   $ 903,000