Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.

No definition available.

Name:	ngen_IfrsNumberOfOperatingSegments
Namespace Prefix:	ngen_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

Segment reporting (Details)	12 Months Ended
Segment reporting (Details)	Dec. 31, 2025 USD ($) segment	Dec. 31, 2025 CAD ($)	Dec. 31, 2025 AUD ($)	Dec. 31, 2024 USD ($)	Dec. 31, 2024 CAD ($)	Dec. 31, 2024 AUD ($)
Segment reporting
Number of reportable segment	1
Number of operating segment	1
USA
Segment reporting
Other current assets	$ 3,833,348	$ 5,238,386		$ 1,646,000	$ 2,368,000
Australia
Segment reporting
Other current assets		$ 486,313	$ 531,664		$ 136,000	$ 153,000