v3.25.2
Note 6 - Fair Value Measurements - Fair Value Assets by Investment Category (Details) - USD ($)
$ in Thousands
Jun. 30, 2025
Dec. 31, 2024
Cash and Cash Equivalents [Member]    
Assets, fair value $ 59,284 $ 68,253
Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 1 [Member]    
Assets, fair value 1 1
Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 2 [Member]    
Assets, fair value 1,044 1,335
Other Current Assets [Member]    
Assets, fair value 1,995 2,168
Other Current Assets [Member] | Fair Value, Inputs, Level 1 [Member]    
Assets, fair value 144 566
Other Current Assets [Member] | Fair Value, Inputs, Level 2 [Member]    
Assets, fair value 1,851 1,602
Cash [Member] | Cash and Cash Equivalents [Member]    
Assets, fair value 58,239 66,917
Cash [Member] | Other Current Assets [Member]    
Assets, fair value 0 0
Money Market Funds [Member] | Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 1 [Member]    
Assets, fair value 1 1
Money Market Funds [Member] | Other Current Assets [Member] | Fair Value, Inputs, Level 1 [Member]    
Assets, fair value 0 0
Money Market Funds, Rabbi Trust [Member] | Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 1 [Member]    
Assets, fair value 0 0
Money Market Funds, Rabbi Trust [Member] | Other Current Assets [Member] | Fair Value, Inputs, Level 1 [Member]    
Assets, fair value 144 566
Certificates of Deposit [Member] | Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 2 [Member]    
Assets, fair value 1,044 1,335
Certificates of Deposit [Member] | Other Current Assets [Member] | Fair Value, Inputs, Level 2 [Member]    
Assets, fair value 1,851 1,602
Reported Value Measurement [Member]    
Assets, fair value 61,279 70,422
Reported Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member]    
Assets, fair value 145 567
Reported Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member]    
Assets, fair value 2,895 2,938
Reported Value Measurement [Member] | Cash [Member]    
Assets, fair value 58,239 66,917
Reported Value Measurement [Member] | Money Market Funds [Member] | Fair Value, Inputs, Level 1 [Member]    
Assets, fair value 1 1
Reported Value Measurement [Member] | Money Market Funds, Rabbi Trust [Member] | Fair Value, Inputs, Level 1 [Member]    
Assets, fair value 144 566
Reported Value Measurement [Member] | Certificates of Deposit [Member] | Fair Value, Inputs, Level 2 [Member]    
Assets, fair value 2,895 2,938
Estimate of Fair Value Measurement [Member]    
Assets, fair value 61,769 70,832
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member]    
Assets, fair value 145 567
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member]    
Assets, fair value 3,385 3,348
Estimate of Fair Value Measurement [Member] | Cash [Member]    
Assets, fair value 58,239 66,917
Estimate of Fair Value Measurement [Member] | Money Market Funds [Member] | Fair Value, Inputs, Level 1 [Member]    
Assets, fair value 1 1
Estimate of Fair Value Measurement [Member] | Money Market Funds, Rabbi Trust [Member] | Fair Value, Inputs, Level 1 [Member]    
Assets, fair value 144 566
Estimate of Fair Value Measurement [Member] | Certificates of Deposit [Member] | Fair Value, Inputs, Level 2 [Member]    
Assets, fair value $ 3,385 $ 3,348