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Note 4 - Short-Term Investment in Equity Securities (Details Textual)
Mar. 31, 2026
$ / shares
Mar. 31, 2026
₪ / shares
Mar. 04, 2026
USD ($)
$ / shares
shares
Aerodrome Group (ARDM) [Member]      
Subsidiary, Ownership Percentage, Parent     51.00%
Aerodrome Group (ARDM) [Member] | ARDM [Member]      
Subsidiary, Ownership Percentage, Noncontrolling Owner     49.00%
Aerodrome Shares [Member]      
Investment Owned, Balance, Shares Purchased (in shares) | shares     11,523,750
Investment Owned, Cost | $     $ 3,000,000
Investment Owned, Balance, Shares Purchased Price Per Share (in dollars per share) | (per share) $ 3.154 ₪ 2.594 $ 0.26
Aerodrome Shares [Member] | Aerodrome Group (ARDM) [Member]      
Subsidiary, Ownership Percentage, Noncontrolling Owner     12.00%