Quarterly report [Sections 13 or 15(d)]

Note 4 - Fair Value Measurements - Investments (Details)

v3.25.1
Note 4 - Fair Value Measurements - Investments (Details) - USD ($)
$ in Thousands
Mar. 31, 2025
Dec. 31, 2024
Adjusted cost [1] $ 34,126 $ 36,041
Gross unrealized gain losses [1] (17) (26)
Fair value [1] 34,109 36,015
Fair Value, Inputs, Level 1 [Member] | Money Market Funds [Member]    
Adjusted cost [1] 7,873 2,092
Gross unrealized gain losses [1] 0 0
Fair value [1] 7,873 2,092
Fair Value, Inputs, Level 2 [Member] | Municipal Bonds [Member]    
Adjusted cost [1] 8,746 3,458
Gross unrealized gain losses [1] (2) 0
Fair value [1] 8,744 3,458
Fair Value, Inputs, Level 2 [Member] | Corporate Debt Securities [Member]    
Adjusted cost [1] 17,507 30,491
Gross unrealized gain losses [1] (15) (26)
Fair value [1] $ 17,492 $ 30,465
[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.