Quarterly report [Sections 13 or 15(d)]

Note 4 - Fair Value Measurements - Investments (Details)

v3.26.1
Note 4 - Fair Value Measurements - Investments (Details) - USD ($)
$ in Thousands
Jun. 30, 2026
Dec. 31, 2025
Adjusted cost [1] $ 14,420 $ 22,987
Gross unrealized gain losses [1] (9) (10)
Fair value [1] 14,411 22,977
Fair Value, Inputs, Level 1 [Member] | Money Market Funds [Member]    
Adjusted cost [1] 5,197 581
Gross unrealized gain losses [1] 0 0
Fair value [1] 5,197 581
Fair Value, Inputs, Level 2 [Member] | Municipal Bonds [Member]    
Adjusted cost [1] 2,510 4,893
Gross unrealized gain losses [1] (1) (1)
Fair value [1] 2,509 4,892
Fair Value, Inputs, Level 2 [Member] | Corporate Debt Securities [Member]    
Adjusted cost [1] 6,713 17,513
Gross unrealized gain losses [1] (8) (9)
Fair value [1] $ 6,705 $ 17,504
[1] FASB Topic 820, Fair Value Measurements, establishes a fair value hierarchy that requires the use of observable market data, when available, and prioritizes the inputs to valuation techniques used to measure fair value in the following categories: Level 1: Quoted market prices in active markets for identical assets or liabilities. Level 2: Observable market-based inputs or unobservable inputs that are corroborated by market data. Level 3: Unobservable inputs that are not corroborated by market data.