Quarterly report pursuant to Section 13 or 15(d)

Note 6 - Fair Value Measurements and Financial Instruments - Assets Measured on a Recurring Basis (Details)

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Note 6 - Fair Value Measurements and Financial Instruments - Assets Measured on a Recurring Basis (Details) - USD ($)
$ in Thousands
Sep. 30, 2024
Dec. 31, 2023
Assets, Fair Value Disclosure $ 6,546 $ 6,488
Level 1 [Member]    
Assets, Fair Value Disclosure 0 0
Level 2 [Member]    
Assets, Fair Value Disclosure 6,546 6,488
Level 3 [Member]    
Assets, Fair Value Disclosure 0 0
High Interest Savings Account [Member]    
Assets, Fair Value Disclosure 6,546 2,002
High Interest Savings Account [Member] | Level 1 [Member]    
Assets, Fair Value Disclosure 0 0
High Interest Savings Account [Member] | Level 2 [Member]    
Assets, Fair Value Disclosure 6,546 2,002
High Interest Savings Account [Member] | Level 3 [Member]    
Assets, Fair Value Disclosure $ 0 0
United States Treasury Bills [Member]    
Assets, Fair Value Disclosure   4,486
United States Treasury Bills [Member] | Level 1 [Member]    
Assets, Fair Value Disclosure   0
United States Treasury Bills [Member] | Level 2 [Member]    
Assets, Fair Value Disclosure   4,486
United States Treasury Bills [Member] | Level 3 [Member]    
Assets, Fair Value Disclosure   $ 0