Annual report pursuant to Section 13 and 15(d)

Note 8 - Fair Value Measurements and Financial Instruments - Assets Measured on a Recurring Basis (Details)

v3.24.1
Note 8 - Fair Value Measurements and Financial Instruments - Assets Measured on a Recurring Basis (Details) - USD ($)
$ in Thousands
Dec. 31, 2023
Dec. 31, 2022
Assets, Fair Value Disclosure $ 6,488 $ 46,363
Level 1 [Member]    
Assets, Fair Value Disclosure 0 0
Level 2 [Member]    
Assets, Fair Value Disclosure 6,488 46,363
Level 3 [Member]    
Assets, Fair Value Disclosure 0 0
Money Market Accounts [Member]    
Assets, Fair Value Disclosure   165
Money Market Accounts [Member] | Level 1 [Member]    
Assets, Fair Value Disclosure   0
Money Market Accounts [Member] | Level 2 [Member]    
Assets, Fair Value Disclosure   165
Money Market Accounts [Member] | Level 3 [Member]    
Assets, Fair Value Disclosure   0
Money Market Funds [Member]    
Assets, Fair Value Disclosure   22,343
Money Market Funds [Member] | Level 1 [Member]    
Assets, Fair Value Disclosure   0
Money Market Funds [Member] | Level 2 [Member]    
Assets, Fair Value Disclosure   22,343
Money Market Funds [Member] | Level 3 [Member]    
Assets, Fair Value Disclosure   0
High Interest Savings Accounts [Member]    
Assets, Fair Value Disclosure 2,002 13,866
High Interest Savings Accounts [Member] | Level 1 [Member]    
Assets, Fair Value Disclosure 0 0
High Interest Savings Accounts [Member] | Level 2 [Member]    
Assets, Fair Value Disclosure 2,002 13,866
High Interest Savings Accounts [Member] | Level 3 [Member]    
Assets, Fair Value Disclosure 0 0
United States Treasury Bills [Member]    
Assets, Fair Value Disclosure 4,486 9,989
United States Treasury Bills [Member] | Level 1 [Member]    
Assets, Fair Value Disclosure 0 0
United States Treasury Bills [Member] | Level 2 [Member]    
Assets, Fair Value Disclosure 4,486 9,989
United States Treasury Bills [Member] | Level 3 [Member]    
Assets, Fair Value Disclosure $ 0 $ 0