Note 2 - Summary of Significant Accounting Policies (Tables)

6 Months Ended

Jun. 30, 2025

Notes Tables

Debt Securities, Held-to-Maturity [Table Text Block]

	As of
Held-to-maturity debt securities:	June 30, 2025			December 31, 2024
Amortized cost	$	20,345		$	21,059
Gross unrecognized gains		67			50
Gross unrecognized losses		(7	)		(33	)
Fair value	$	20,405		$	21,076

Investments Classified by Contractual Maturity Date [Table Text Block]

	Amortized Cost		Fair Value
Within one year	$	12,420	$	12,455
After one year through two years		6,943		6,955
After two years through three years		982		995
Total	$	20,345	$	20,405

Financing Receivable, Allowance for Credit Loss [Table Text Block]

At January 1, 2024	$	111
Provision charged to expense		—
(Write-offs) / Recoveries		(5	)
At December 31, 2024	$	106
Provision charged to expense		—
(Write-offs) / Recoveries		2
At June 30, 2025	$	108