v3.26.1
Note 3 - Stockholders' Equity - Schedule of Warrant Activity (Details) - $ / shares
 6 Months Ended
Jun. 30, 2026
May 19, 2025
Warrants, exercise price (in dollars per share)   $ 25
ZNWAA Warrants [Member]    
Warrants, exercise price (in dollars per share) [1],[2],[3],[4],[5] $ 2  
Warrants, outstanding (in shares) 1,498,804  
Warrants, issued (in shares) 0  
Warrants, exercised (in shares) 0  
Warrants, expired (in shares) 0  
Warrants, outstanding (in shares) 1,498,804  
Warrant, expiration date Jan. 31, 2031  
ZNWAS Warrants [Member]    
Warrants, exercise price (in dollars per share) [4],[6] $ 0.25  
Warrants, outstanding (in shares) 0  
Warrants, issued (in shares) 145,180,117  
Warrants, exercised (in shares) 0  
Warrants, expired (in shares) 0  
Warrants, outstanding (in shares) 145,180,117  
Warrant, expiration date Oct. 15, 2026  
ZNWAT Warrants [Member]    
Warrants, exercise price (in dollars per share) $ 0.18  
Warrants, outstanding (in shares) 9,019,652  
Warrants, issued (in shares) 0  
Warrants, exercised (in shares) 0  
Warrants, expired (in shares) 0  
Warrants, outstanding (in shares) 9,019,652  
Warrant, expiration date Aug. 31, 2026  
ZNWAU Warrants [Member]    
Warrants, exercise price (in dollars per share) $ 0.25  
Warrants, outstanding (in shares) 0  
Warrants, issued (in shares) 19,147,462  
Warrants, exercised (in shares) 0  
Warrants, expired (in shares) 0  
Warrants, outstanding (in shares) 19,147,462  
Warrant, expiration date Oct. 15, 2026  
ZNWBB Warrants [Member]    
Warrants, exercise price (in dollars per share) $ 0.25  
Warrants, outstanding (in shares) 15,000,000  
Warrants, issued (in shares) 0  
Warrants, exercised (in shares) 0  
Warrants, expired (in shares) 0  
Warrants, outstanding (in shares) 15,000,000  
Warrant, expiration date Oct. 15, 2026  
ZNWBA Warrants [Member]    
Warrants, exercise price (in dollars per share) $ 0.25  
Warrants, outstanding (in shares) 1,177,950  
Warrants, issued (in shares) 0  
Warrants, exercised (in shares) (396,890)  
Warrants, expired (in shares) (781,060)  
Warrants, outstanding (in shares) 0  
Warrants [Member]    
Warrants, outstanding (in shares) 26,696,406  
Warrants, issued (in shares) 164,327,579  
Warrants, exercised (in shares) (396,890)  
Warrants, expired (in shares) (781,060)  
Warrants, outstanding (in shares) 189,846,035  
[1] On December 14, 2022, the Company extended the expiration date of the warrants by one (1) year.
[2] On January 10, 2024, the Company extended the expiration date of the ZNWAA warrant by one (1) year.
[3] On May 29, 2019, the Company extended the expiration date of the warrants by one (1) year.
[4] On November 12, 2024, the Company extended the expiration date of the ZNWAA warrant by one (1) year. The newexpiration date is January 31, 2026.
[5] On September 15, 2020, the Company extended the expiration date of the warrants by two (2) years.
[6] These warrants were issued and become exercisable beginning on January 15, 2026 and expire on June 30, 2026.