Quarterly report pursuant to Section 13 or 15(d)

Restricted Cash Equivalents and Investments (Schedule of Estimated Fair Value of Available-for-Sale Securities) (Details)

v3.22.2.2
Restricted Cash Equivalents and Investments (Schedule of Estimated Fair Value of Available-for-Sale Securities) (Details)
$ in Thousands
Jun. 30, 2022
USD ($)
Schedule of Available-for-sale Securities [Line Items]  
Amortized Cost $ 3,580
Estimated Market Value 3,509
Investments [Member]  
Schedule of Available-for-sale Securities [Line Items]  
Amortized Cost, Due within one year 1,487
Amortized Cost, Due after one year through five years 1,398
Amortized Cost 2,885
Estimated Market Value, Due within one year 1,463
Estimated Market Value, Due after one year through five years 1,351
Estimated Market Value $ 2,814