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Senior Secured Credit Agreement (Details) - Senior Secured Reserve-Based Credit Facility - Line of Credit - Revolving credit facility	Apr. 11, 2016 USD ($)	Sep. 30, 2019 USD ($)
Line of Credit Facility [Line Items]
Term of revolving credit facility	3 years
Maximum amount available under revolving credit facility	$ 50,000,000
Initial borrowing base		$ 40,000,000
Amount outstanding		0
Placement fee percentage	0.50%
Placement fee percentage	$ 50,000
Commitment fee percentage	0.25%
Maximum total leverage ratio (not more than)	3.00
Debt service coverage ratio (not less than)	1.10
Minimum consolidated tangible net worth	$ 50,000,000
Debt issuance costs	$ 168,972
Unamortized debt issuance costs		$ 23,256
LIBOR
Line of Credit Facility [Line Items]
Basis spread on variable rate	2.75%
Prime rate
Line of Credit Facility [Line Items]
Basis spread on variable rate	1.00%

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Debt Covenant, Maximum Total Leverage Ratio

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Debt Service Coverage Ratio

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- Definition

Line of Credit Facility, Covenant Compliance, Minimum Consolidated Tangible Net Worth

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- Definition

Line of Credit Facility, Initial Borrowing Base

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- Definition

Line of Credit Facility, Placement Fee Percentage

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- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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- Definition

Amount of the fee that accompanies borrowing money under the debt instrument.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(b))
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- Definition

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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- Definition

The fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used.

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- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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The remaining balance of debt issuance expenses that were capitalized and are being amortized against income over the lives of the respective bond issues. This does not include the amounts capitalized as part of the cost of the utility plant or asset.

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