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Note 14 - Fair Value Measurements (Tables)

6 Months Ended

Mar. 31, 2022

Notes Tables

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]

		Fair Value Measurements - March 31, 2022
						Quoted				Significant
						Prices				Other				Significant
						in Active				Observable				Unobservable
		Fair				Markets				Inputs				Inputs
		Value				(Level 1)				(Level 2)				(Level 3)
Assets:
Interest rate swaps		$	1,359,498			$	—			$	1,359,498			$	—
Total		$	1,359,498			$	—			$	1,359,498			$	—
Liabilities:
Natural gas purchases		$	1,355,281			$	—			$	1,355,281			$	—
Total		$	1,355,281			$	—			$	1,355,281			$	—

		Fair Value Measurements - September 30, 2021
						Quoted				Significant
						Prices				Other				Significant
						in Active				Observable				Unobservable
		Fair				Markets				Inputs				Inputs
		Value				(Level 1)				(Level 2)				(Level 3)
Liabilities:
Natural gas purchases		$	2,728,935			$	—			$	2,728,935			$	—
Interest rate swaps			1,196,083				—				1,196,083				—
Total		$	3,925,018			$	—			$	3,925,018			$	—

Fair Value, by Balance Sheet Grouping [Table Text Block]

	Fair Value Measurements - March 31, 2022
				Quoted			Significant
				Prices			Other			Significant
				in Active			Observable			Unobservable
	Carrying			Markets			Inputs			Inputs
	Value			(Level 1)			(Level 2)			(Level 3)
Liabilities:
Current maturities of long-term debt	$	19,705,200		$	—		$	—		$	19,765,421
Notes payable		105,125,000			—			—			107,952,588
Total	$	124,830,200		$	—		$	—		$	127,718,009

		Fair Value Measurements - September 30, 2021
						Quoted				Significant
						Prices				Other				Significant
						in Active				Observable				Unobservable
		Carrying				Markets				Inputs				Inputs
		Value				(Level 1)				(Level 2)				(Level 3)
Liabilities:
Current maturities of long-term debt		$	7,000,000			$	—			$	—			$	7,000,000
Notes payable			116,110,200				—				—				124,691,896
Total		$	123,110,200			$	—			$	—			$	131,691,896

X

- Definition

Tabular disclosure of the fair value of financial instruments, including financial assets and financial liabilities, and the measurements of those instruments, assets, and liabilities.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 11
-URI https://asc.fasb.org/extlink&oid=123594938&loc=d3e13467-108611

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258

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- Definition

Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258

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