XML 89 R75.htm IDEA: XBRL DOCUMENT v3.22.1
RELATED-PARTY TRANSACTIONS - Related Party Purchases (Details) - Affiliated Entity - USD ($)
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Related Party Transaction [Line Items]    
Coal purchases from related party $ 1,098,328 $ 0
Fuel Service and Beneficial Use Agreement ("FBUA") | Northampton Fuel Supply Company, Inc.    
Related Party Transaction [Line Items]    
Coal purchases from related party 163,412 0
Waste Coal Agreement (the “WCA”) | Coal Valley Sales, LLC    
Related Party Transaction [Line Items]    
Coal purchases from related party $ 934,916 $ 0