Other Liabilities (Details Narrative) - CAD ($)	12 Months Ended
Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2023
Other Liabilities
Stock based compensation	$ 89,449
Comprehensive loss		$ 487,520	$ 820,612

The element represents stock based compensations1.

No definition available.

Name:	fnuc_StockBasedCompensations1
Namespace Prefix:	fnuc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration