Note 3 - Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2025

Notes Tables

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]

	Fair Value Measurements as of June 30, 2025 (000's):
	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Fair Value
Assets
Corporate bonds	$	—	$	61,175	$	—	$	61,175
Commercial paper		9,415		—		—		9,415
Certificates of deposit		—		918		—		918
U.S. government treasuries		2,734		—		—		2,734
Asset-backed securities		—		3,851		—		3,851
Money market funds (cash equivalents)		3,730		—		—		3,730
Total assets	$	15,879	$	65,944	$	—	$	81,823

	Fair Value Measurements as of December 31, 2024 (000's):
	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Fair Value
Assets
Corporate bonds	$	—	$	44,963	$	—	$	44,963
Commercial paper		12,084		—		—		12,084
Certificates of deposit		—		15,269		—		15,269
U.S. government treasuries		4,399		—		—		4,399
Asset-backed securities		—		6,524		—		6,524
Money market funds (cash equivalents)		23,880		—		—		23,880
Total assets	$	40,363	$	66,756	$	—	$	107,119