Note 4 - Fair Value Measurements - Financial Assets Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Marketable Securities	$ 178,263	$ 83,239
Corporate Debt Securities [Member]
Marketable Securities	86,636	44,963
Certificates of Deposit [Member]
Marketable Securities	14,960	15,269
Commercial Paper, Not Included with Cash and Cash Equivalents [Member]
Marketable Securities	68,977	12,084
US Treasury Securities [Member]
Marketable Securities	1,664	4,399
Asset-Backed Securities [Member]
Marketable Securities	6,026	6,524
Fair Value, Recurring [Member]
Marketable Securities	6,026
Total assets	186,646	107,119
Fair Value, Recurring [Member] | Corporate Debt Securities [Member]
Marketable Securities	86,636	44,963
Fair Value, Recurring [Member] | Certificates of Deposit [Member]
Marketable Securities	14,960	15,269
Fair Value, Recurring [Member] | Commercial Paper, Not Included with Cash and Cash Equivalents [Member]
Marketable Securities	68,977	12,084
Fair Value, Recurring [Member] | US Treasury Securities [Member]
Marketable Securities	1,664	4,399
Fair Value, Recurring [Member] | Asset-Backed Securities [Member]
Marketable Securities		6,524
Fair Value, Recurring [Member] | Money Market Funds [Member]
Money market funds (cash equivalents)	8,383	23,880
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Total assets	79,024	40,363
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Corporate Debt Securities [Member]
Marketable Securities	0	0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Certificates of Deposit [Member]
Marketable Securities	0	0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Commercial Paper, Not Included with Cash and Cash Equivalents [Member]
Marketable Securities	68,977	12,084
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | US Treasury Securities [Member]
Marketable Securities	1,664	4,399
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Asset-Backed Securities [Member]
Marketable Securities	0	0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Money Market Funds [Member]
Money market funds (cash equivalents)	8,383	23,880
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Total assets	107,622	66,756
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Corporate Debt Securities [Member]
Marketable Securities	86,636	44,963
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Certificates of Deposit [Member]
Marketable Securities	14,960	15,269
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Commercial Paper, Not Included with Cash and Cash Equivalents [Member]
Marketable Securities	0	0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | US Treasury Securities [Member]
Marketable Securities	0	0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Asset-Backed Securities [Member]
Marketable Securities	6,026	6,524
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Money Market Funds [Member]
Money market funds (cash equivalents)	0	0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Total assets	0	0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Corporate Debt Securities [Member]
Marketable Securities	0	0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Certificates of Deposit [Member]
Marketable Securities	0	0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Commercial Paper, Not Included with Cash and Cash Equivalents [Member]
Marketable Securities	0	0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | US Treasury Securities [Member]
Marketable Securities	0	0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Asset-Backed Securities [Member]
Marketable Securities	0	0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Money Market Funds [Member]
Money market funds (cash equivalents)	$ 0	$ 0