Note 5 - Fair Value Measurements - Fair Value Assets by Investment Category (Details) - USD ($) $ in Thousands	Sep. 30, 2026	Dec. 31, 2025
Assets, Fair Value, Cash and Cash Equivalents	$ 333,122	$ 57,800
Assets, Fair Value, Other Current Assets	856	2,177
Fair Value, Inputs, Level 1 [Member]
Assets, Fair Value, Cash and Cash Equivalents	44,490	1
Assets, Fair Value, Other Current Assets	856	586
Fair Value, Inputs, Level 2 [Member]
Assets, Fair Value, Cash and Cash Equivalents	417	268
Assets, Fair Value, Other Current Assets	0	1,591
Cash [Member]
Assets, Fair Value, Cash and Cash Equivalents	288,215	57,531
Assets, Fair Value, Other Current Assets	0	0
Money Market Funds [Member] \| Fair Value, Inputs, Level 1 [Member]
Assets, Fair Value, Cash and Cash Equivalents	44,490	1
Assets, Fair Value, Other Current Assets	0	0
Money Market Funds, Rabbi Trust [Member] \| Fair Value, Inputs, Level 1 [Member]
Assets, Fair Value, Cash and Cash Equivalents	0	0
Assets, Fair Value, Other Current Assets	856	586
Certificates of Deposit [Member] \| Fair Value, Inputs, Level 2 [Member]
Assets, Fair Value, Cash and Cash Equivalents	417	268
Assets, Fair Value, Other Current Assets	0	1,591
Reported Value Measurement [Member]
Assets, fair value	333,978	59,977
Reported Value Measurement [Member] \| Fair Value, Inputs, Level 1 [Member]
Assets, fair value	45,346	587
Reported Value Measurement [Member] \| Fair Value, Inputs, Level 2 [Member]
Assets, fair value	417	1,859
Reported Value Measurement [Member] \| Cash [Member]
Assets, fair value	288,215	57,531
Reported Value Measurement [Member] \| Money Market Funds [Member] \| Fair Value, Inputs, Level 1 [Member]
Assets, fair value	44,490	1
Reported Value Measurement [Member] \| Money Market Funds, Rabbi Trust [Member] \| Fair Value, Inputs, Level 1 [Member]
Assets, fair value	856	586
Reported Value Measurement [Member] \| Certificates of Deposit [Member] \| Fair Value, Inputs, Level 2 [Member]
Assets, fair value	417	1,859
Estimate of Fair Value Measurement [Member]
Assets, fair value	334,073	60,239
Estimate of Fair Value Measurement [Member] \| Fair Value, Inputs, Level 1 [Member]
Assets, fair value	45,346	587
Estimate of Fair Value Measurement [Member] \| Fair Value, Inputs, Level 2 [Member]
Assets, fair value	512	2,121
Estimate of Fair Value Measurement [Member] \| Cash [Member]
Assets, fair value	288,215	57,531
Estimate of Fair Value Measurement [Member] \| Money Market Funds [Member] \| Fair Value, Inputs, Level 1 [Member]
Assets, fair value	44,490	1
Estimate of Fair Value Measurement [Member] \| Money Market Funds, Rabbi Trust [Member] \| Fair Value, Inputs, Level 1 [Member]
Assets, fair value	856	586
Estimate of Fair Value Measurement [Member] \| Certificates of Deposit [Member] \| Fair Value, Inputs, Level 2 [Member]
Assets, fair value	$ 512	$ 2,121