Note 4 - Unproved Oil and Gas Properties, Full Cost Method (Details Textual) - USD ($)	3 Months Ended	6 Months Ended
Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Oil and Gas, Full Cost Method, Capitalized Cost Excluded from Amortization, Non Cash Period Cost	$ 534,000	$ 965,000	$ 1,566,000	$ 1,658,000

Amount of capitalized acquisition, exploration, and development costs and capitalized interest incurred during period and excluded from amortization for oil- and gas-producing activities accounted for under full cost method that is not made in cash.

No definition available.

Name:	znog_OilAndGasFullCostMethodCapitalizedCostExcludedFromAmortizationNonCashPeriodCost
Namespace Prefix:	znog_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration