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Long-Term Debt (Tables) | 6 Months Ended
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Mar. 31, 2020
Debt Disclosure [Abstract] |
Schedule of Long-Term Debt | Long-term debt consists of the following:
| March 31, 2020 |  | September 30, 2019
| Principal |  | Unamortized Debt Issuance Costs |  | Principal |  | Unamortized Debt Issuance Costs
Roanoke Gas Company: |  |  |  |  |  |  |
Unsecured senior notes payable, at 4.26% due on September 18, 2034 | $ | 30,500,000 |  |  | $ | 139,984 |  |  | $ | 30,500,000 |  |  | $ | 144,811 |
Unsecured term note payable, at 30-day LIBOR plus 0.90%, due November 1, 2021 | 7,000,000 |  |  | 5,280 |  |  | 7,000,000 |  |  | 6,948 |
Unsecured term notes payable, at 3.58% due on October 2, 2027 | 8,000,000 |  |  | 36,120 |  |  | 8,000,000 |  |  | 38,528 |
Unsecured term notes payable, at 4.41% due on March 28, 2031 | 10,000,000 |  |  | 34,459 |  |  | 10,000,000 |  |  | 36,272 |
Unsecured term notes payable, at 3.60% due on December 6, 2029 | 10,000,000 |  |  | 34,346 |  |  | — |  |  | — |
RGC Midstream, LLC: |  |  |  |  |  |  |
Unsecured term notes payable, at 30-day LIBOR plus 1.35%, due December 29, 2022 | 23,075,200 |  |  | 68,492 |  |  | 16,012,200 |  |  | 59,504 |
Unsecured term note payable, at 30-day LIBOR plus 1.15%, due June 12, 2026 | 14,000,000 |  |  | 15,048 |  |  | 14,000,000 |  |  | 16,252 |
Unsecured term note payable, at 30-day LIBOR plus 1.20%, due June 1, 2024 | 10,000,000 |  |  | 9,822 |  |  | 10,000,000 |  |  | 11,000 |
Total notes payable | $ | 112,575,200 |  |  | $ | 343,551 |  |  | $ | 95,512,200 |  |  | $ | 313,315 |
Line-of-credit, at 30-day LIBOR plus 1.00%, due March 31, 2022 | $ | — |  |  | $ | — |  |  | $ | 8,172,473 |  |  | $ | — |
Total long-term debt | $ | 112,575,200 |  |  | $ | 343,551 |  |  | $ | 103,684,673 |  |  | $ | 313,315 |

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- Definition Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28541-108399 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21506-112644 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(e),(f)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28551-108399 Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21521-112644 Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21538-112644 Reference 8: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823 Reference 9: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400 Reference 10: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21475-112644 + Details
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