Annual report pursuant to Section 13 and 15(d)

Note 5 - Fair Value Measurements - Investments (Details)

v3.22.4
Note 5 - Fair Value Measurements - Investments (Details) - USD ($)
$ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Adjusted cost [1] $ 56,849 $ 66,580
Gross unrealized losses [1] (16) (18)
Fair value [1] 56,833 66,562
Fair value [1] (56,833) (66,562)
Money Market Funds [Member] | Fair Value, Inputs, Level 1 [Member]    
Adjusted cost [1] 2,143 20,711
Gross unrealized losses [1] 0 0
Fair value [1] 2,143 20,711
Fair value [1] (2,143) (20,711)
Municipal Bonds [Member] | Fair Value, Inputs, Level 2 [Member]    
Adjusted cost [1] 6,759 14,006
Gross unrealized losses [1] 0 (2)
Fair value [1] 6,759 14,004
Fair value [1] (6,759) (14,004)
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]    
Adjusted cost [1] 47,947 31,863
Gross unrealized losses [1] (16) (16)
Fair value [1] 47,931 31,847
Fair value [1] $ (47,931) $ (31,847)
[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.