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Fair Value Measurements (Tables)
 12 Months Ended
Sep. 30, 2020
Fair Value Disclosures [Abstract]  
Schedule of Fair Value of Financial Assets and Liabilities Measured on a Recurring Basis
The following table summarizes the Company’s financial assets and liabilities that are measured at fair value on a recurring basis and the fair value measurements by level within the fair value hierarchy as defined in Note 1 as of September 30, 2020 and 2019, respectively:
 
  Fair Value Measurements - September 30, 2020
 Fair ValueQuoted Prices in
Active Markets
Level 1		Significant  Other
Observable
Inputs
Level 2		Significant
Unobservable
Inputs
Level 3
Liabilities:
Natural gas purchases$470,755 $— $470,755 $— 
Interest rate swaps2,223,556 — 2,223,556 — 
Total$2,694,311 $— $2,694,311 $— 

  Fair Value Measurements - September 30, 2019
 Fair ValueQuoted Prices in
Active Markets
Level 1		Significant Other
Observable
Inputs
Level  2		Significant
Unobservable
Inputs
Level 3
Liabilities:
Natural gas purchases$397,757 $— $397,757 $— 
Interest rate swaps894,341 — 894,341 — 
Total$1,292,098 $— $1,292,098 $— 
Summary of the Fair Value of Financial Assets and Liabilities Not Adjusted to Fair Value The following table summarizes the fair value of the Company’s financial assets and liabilities that are not adjusted to fair value in the consolidated financial statements as of September 30, 2020 and 2019. 
  Fair Value Measurements - September 30, 2020
 Carrying
Amount		Quoted Prices in
Active Markets
Level 1		Significant Other
Observable  Inputs
Level 2		Significant
Unobservable
Inputs
Level 3
Liabilities:
Notes payable$114,975,200 $— $— $124,740,970 
Total$114,975,200 $— $— $124,740,970 

  Fair Value Measurements - September 30, 2019
 Carrying
Amount		Quoted Prices in
Active  Markets
Level 1		Significant Other
Observable  Inputs
Level 2		Significant
Unobservable
Inputs
Level 3
Liabilities:
Notes payable$95,512,200 $— $— $100,900,952 
Total$95,512,200 $— $— $100,900,952