XML 51 R37.htm IDEA: XBRL DOCUMENT
v3.25.1

Leases (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2024
Leases [Abstract] |
Schedule of Balance Sheet Impact | The following table reflects the amounts related to leases that are recorded on our Consolidated Balance Sheets as of the dates presented:
|  | Classification on Consolidated |  | December 31,
Description |  | Balance Sheets |  | 2024 |  | 2023
Operating lease assets |  | Other assets |  | $ | 607 |  |  | $ | 210 |
Finance lease assets |  | Other assets |  | — |  |  | 1,045 |
Total right of use assets |  |  |  | $ | 607 |  |  | $ | 1,255 |
Current lease liabilities - operating |  | Accrued liabilities |  | $ | 153 |  |  | $ | 58 |
Current lease liabilities - financing |  | Accrued liabilities |  | — |  |  | 307 |
Total current lease liabilities |  |  |  | 153 |  |  | 365 |
Noncurrent lease liabilities - operating |  | Other long-term liabilities |  | 454 |  |  | 173 |
Noncurrent lease liabilities - financing |  | Other long-term liabilities |  | — |  |  | 723 |
Total noncurrent lease liabilities |  |  |  | 454 |  |  | 896 |
Total lease liabilities |  |  |  | $ | 607 |  |  | $ | 1,261 |
Weighted average remaining lease term (in years) |  |  |  | 3.8 |  | 3.1
Weighted average discount rate |  |  |  | 8.3 | % |  | 9.1 | %
Schedule of Cash Flow Impact | The following table summarizes the cash paid for amounts included in the measurement of liabilities included in our Consolidated Statements of Cash Flows for the periods presented:
| Year Ended December 31,
| 2024 |  | 2023 |  | 2022
Operating lease cost (1) (2) | $ | 712 |  |  | $ | 485 |  |  | $ | 384 |
Finance lease cost | $ | 622 |  |  | $ | 95 |  |  | $ | 3 |
(1) Lease costs are classified in the Consolidated Statements of Operations within cost of revenues and selling, general and administrative expenses. (2) Includes costs of $0.1 million, $0.3 million and $0.2 million for leases with terms of 12 months or less and $0.6 million, $0.2 million and $0.2 million for leases with terms greater than 12 months for the years ended December 31, 2024, 2023 and 2022, respectively.
Schedule of Future Maturities of Lease Liabilities | The following summarizes the future maturities of our lease liabilities for the periods presented:
Year Ending December 31, |  |
2025 |  | $ | 212 |
2026 |  | 210 |
2027 |  | 171 |
2028 |  | 135 |
2029 |  | 23 |
Total lease payments |  | 751 |
Less: Imputed interest |  | (144) |
Total |  | $ | 607 |

X
- Definition Assets And Liabilities, Lessee + References No definition available. + Details
Name: | ngs_AssetsAndLiabilitiesLesseeTableTextBlock
Namespace Prefix: | ngs_
Data Type: | dtr-types1:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of lessee's lease cost. Includes, but is not limited to, interest expense for finance lease, amortization of right-of-use asset for finance lease, operating lease cost, short-term lease cost, variable lease cost and sublease income. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147478964/842-20-50-4 + Details
Name: | us-gaap_LeaseCostTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_LeasesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of undiscounted cash flows of lessee's operating lease liability. Includes, but is not limited to, reconciliation of undiscounted cash flows to operating lease liability recognized in statement of financial position. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org/1943274/2147478964/842-20-50-6 + Details
Name: | us-gaap_LesseeOperatingLeaseLiabilityMaturityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration