Note 1 - Summary of Significant Accounting Policies - Fair Value of Financial Assets and Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Estimate of Fair Value Measurement [Member]
Long-term debt, fair value	$ 81,384	$ 62,801
Reported Value Measurement [Member]
Long-term debt, fair value	81,384	62,801
Fair Value, Recurring [Member]
Assets, fair value	4,565	4,199
Fair Value, Recurring [Member] \| Contingent Considerations [Member]
Liabilities, fair value	661	859
Money Market Funds [Member] \| Fair Value, Recurring [Member]
Assets, fair value	4,565	4,199
Fair Value, Inputs, Level 1 [Member] \| Estimate of Fair Value Measurement [Member]
Long-term debt, fair value	81,384	62,801
Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member]
Assets, fair value	4,565	4,199
Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member] \| Contingent Considerations [Member]
Liabilities, fair value	0	0
Fair Value, Inputs, Level 1 [Member] \| Money Market Funds [Member] \| Fair Value, Recurring [Member]
Assets, fair value	4,565	4,199
Fair Value, Inputs, Level 2 [Member] \| Estimate of Fair Value Measurement [Member]
Long-term debt, fair value	0	0
Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member]
Assets, fair value	0	0
Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member] \| Contingent Considerations [Member]
Liabilities, fair value	0	0
Fair Value, Inputs, Level 2 [Member] \| Money Market Funds [Member] \| Fair Value, Recurring [Member]
Assets, fair value	0	0
Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member]
Assets, fair value	0	0
Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member] \| Contingent Considerations [Member]
Liabilities, fair value	661	859
Fair Value, Inputs, Level 3 [Member] \| Money Market Funds [Member] \| Fair Value, Recurring [Member]
Assets, fair value	$ 0	$ 0