Note 5 - Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2026

Notes Tables

Fair Value, Assets Measured on Recurring Basis [Table Text Block]

	September 30, 2026
	Level 1		Level 2		Level 3		Total
Cash and cash equivalents (a) (b)	$	86,596	$	—	$	—	$	86,596
Marketable securities:
Equity securities		41		—		—		41
Total marketable securities		41		—		—		41
Convertible promissory note (c)		—		—		2,520		2,520
Total	$	86,637	$	—	$	2,520	$	89,157

	December 31, 2025
	Level 1		Level 2		Level 3		Total
Cash and cash equivalents (a) (b)	$	41,317	$	—	$	—	$	41,317
Marketable securities:
Equity securities		36		—		—		36
Total marketable securities		36		—		—		36
Convertible promissory note (c)		—		—		—		—
Total	$	41,353	$	—	$	—	$	41,353

Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]

	Three Months Ended September 30, 2026
	Fair Value Beginning of Period		Net Realized and Unrealized Gains (Losses) Included in Income		Purchases and Sales, Net		Fair Value End of Period
Assets:
Convertible promissory note (a)	$	1,975	$	49	$	496	$	2,520
Total	$	1,975	$	49	$	496	$	2,520

	Three Months Ended September 30, 2025
	Fair Value Beginning of Period		Net Realized and Unrealized Gains (Losses) Included in Income		Purchases and Sales, Net		Fair Value End of Period
Assets:
Convertible promissory note (a)	$	—	$	—	$	—	$	—
Total	$	—	$	—	$	—	$	—

	Nine Months Ended September 30, 2026
	Fair Value Beginning of Year		Net Realized and Unrealized Gains (Losses) Included in Income		Purchases and Sales, Net		Fair Value End of Period
Assets:
Convertible promissory note (a)	$	—	$	56	$	2,464	$	2,520
Total	$	—	$	56	$	2,464	$	2,520

	Nine Months Ended September 30, 2025
	Fair Value Beginning of Year		Net Realized and Unrealized Gains (Losses) Included in Income		Purchases and Sales, Net		Fair Value End of Period
Assets:
Convertible promissory note (a)	$	—	$	—	$	—	$	—
Total	$	—	$	—	$	—	$	—

	Three Months Ended September 30, 2026
	Net Investment Income		Net Gains (Losses)		Total
Assets:
Convertible promissory note	$	49	$	—	$	49
Total	$	49	$	—	$	49

	Three Months Ended September 30, 2025
	Net Investment Income		Net Gains (Losses)		Total
Assets:
Convertible promissory note	$	—	$	—	$	—
Total	$	—	$	—	$	—

	Nine Months Ended September 30, 2026
	Net Investment Income		Net Gains (Losses)		Total
Assets:
Convertible promissory note	$	56	$	—	$	56
Total	$	56	$	—	$	56

	Nine Months Ended September 30, 2025
	Net Investment Income		Net Gains (Losses)		Total
Assets:
Convertible promissory note	$	—	$	—	$	—
Total	$	—	$	—	$	—