Quarterly report pursuant to Section 13 or 15(d)

Note 4 - Fair Value Measurements - Investments (Details)

v3.22.2
Note 4 - Fair Value Measurements - Investments (Details) - USD ($)
$ in Thousands
Jun. 30, 2022
Dec. 31, 2021
Adjusted cost [1] $ 60,592 $ 66,580
Gross unrealized losses [1] (5) (18)
Fair value [1] 60,587 66,562
Fair value [1] (60,587) (66,562)
Fair Value, Inputs, Level 1 [Member] | Money Market Funds [Member]    
Adjusted cost [1] 28,282 20,711
Gross unrealized losses [1] 0 0
Fair value [1] 28,282 20,711
Fair value [1] (28,282) (20,711)
Fair Value, Inputs, Level 2 [Member] | Municipal Bonds [Member]    
Adjusted cost [1] 29,814 14,006
Gross unrealized losses [1] (4) (2)
Fair value [1] 29,810 14,004
Fair value [1] (29,810) (14,004)
Fair Value, Inputs, Level 2 [Member] | Corporate Debt Securities [Member]    
Adjusted cost [1] 2,496 31,863
Gross unrealized losses [1] (1) (16)
Fair value [1] 2,495 31,847
Fair value [1] $ (2,495) $ (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.