Quarterly report pursuant to Section 13 or 15(d)

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

v3.22.2.2
Restricted Cash Equivalents and Investments (Schedule of Cash Equivalents and Available-for-Sale Securities) (Details)
Jun. 30, 2022
USD ($)
Schedule of Available-for-sale Securities [Line Items]  
Amortized Cost $ 3,580,000
Gross Unrealized Losses (71,000)
Fair Value 3,509,000
Cash Equivalents 695,000
Short-Term Investments 1,462,747
Long-Term Investments 1,351,000
Cash and Cash Equivalents [Member]  
Schedule of Available-for-sale Securities [Line Items]  
Amortized Cost 695,000
Fair Value 695,000
Cash Equivalents 695,000
Money Market Funds [Member]  
Schedule of Available-for-sale Securities [Line Items]  
Amortized Cost 695,000
Fair Value 695,000
Cash Equivalents 695,000
Investments [Member]  
Schedule of Available-for-sale Securities [Line Items]  
Amortized Cost 2,885,000
Gross Unrealized Losses (71,000)
Fair Value 2,814,000
Short-Term Investments 1,463,000
Long-Term Investments 1,351,000
Corporate Notes/Bonds [Member]  
Schedule of Available-for-sale Securities [Line Items]  
Amortized Cost 2,885,000
Gross Unrealized Losses (71,000)
Fair Value 2,814,000
Short-Term Investments 1,463,000
Long-Term Investments $ 1,351,000