Quarterly report pursuant to Section 13 or 15(d)

NOTES PAYABLE AND DEBT INSTRUMENTS - Summary of Revenue Bonds (Details)

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NOTES PAYABLE AND DEBT INSTRUMENTS - Summary of Revenue Bonds (Details) - Notes Payable
Mar. 31, 2021
USD ($)
2020A Bond Series Maturing December 1, 2025  
Debt Instrument [Line Items]  
Principal amount $ 12,370,000
Interest rate, percent 6.25%
2020A Bond Series Maturing December 1, 2030  
Debt Instrument [Line Items]  
Principal amount $ 38,700,000
Interest rate, percent 6.50%
2020A Bond Series Maturing December 1, 2042  
Debt Instrument [Line Items]  
Principal amount $ 168,480,000
Interest rate, percent 7.00%
2020B Bond Series Maturing December 1, 2025  
Debt Instrument [Line Items]  
Principal amount $ 10,000,000
Interest rate, percent 10.00%
2020B Bond Series Maturing December 1, 2027  
Debt Instrument [Line Items]  
Principal amount $ 10,000,000
Interest rate, percent 10.00%
2020C Bond Series Maturing December 1, 2027  
Debt Instrument [Line Items]  
Principal amount $ 10,000,000
Interest rate, percent 13.00%