Quarterly report pursuant to Section 13 or 15(d)

Note 4 - Fair Value Measurements - Investments (Details)

v3.23.1
Note 4 - Fair Value Measurements - Investments (Details) - USD ($)
$ in Thousands
Mar. 31, 2023
Dec. 31, 2022
Adjusted cost [1] $ 55,169 $ 56,849
Gross unrealized losses [1] (19) (16)
Fair value [1] 55,150 56,833
Fair value [1] (55,150) (56,833)
Fair Value, Inputs, Level 1 [Member] | Money Market Funds [Member]    
Adjusted cost [1] 7,622 2,143
Gross unrealized losses [1] 0 0
Fair value [1] 7,622 2,143
Fair value [1] (7,622) (2,143)
Fair Value, Inputs, Level 2 [Member] | Municipal Bonds [Member]    
Adjusted cost [1] 0 6,759
Gross unrealized losses [1] 0 0
Fair value [1] 0 6,759
Fair value [1] 0 (6,759)
Fair Value, Inputs, Level 2 [Member] | Corporate Debt Securities [Member]    
Adjusted cost [1] 47,547 47,947
Gross unrealized losses [1] (19) (16)
Fair value [1] 47,528 47,931
Fair value [1] $ (47,528) $ (47,931)
[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.