- DefinitionThe maximum leverage ratio (consolidated funded debt / trailing twelve months adjusted EBITDA) under the covenant of the debt instrument.
| Name: |
hnrg_DebtInstrumentCovenantMaximumLeverageRatio |
| Namespace Prefix: |
hnrg_ |
| Data Type: |
xbrli:pureItemType |
| Balance Type: |
na |
| Period Type: |
instant |