The element represents cash paid for acquisition of property plant and equipment

No definition available.

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Namespace Prefix:	nb_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant

- Definition

Other indirect costs related to the acquisition of land and mineral rights.

+ References

No definition available.

+ Details

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Namespace Prefix:	nb_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The element represents royalty rate

+ References

No definition available.

+ Details

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Namespace Prefix:	nb_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Future cash outflow to pay for construction in progress expenditures that have occurred.

+ References

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-Name Accounting Standards Codification
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-SubTopic 10
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- Definition

Amount before accumulated depletion of real estate held for productive use, excluding land held for sale.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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-SubTopic 10
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+ Details

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Balance Type:	debit
Period Type:	instant

- Definition

The cash outflow from the acquisition of a mineral right which is the right to extract a mineral from the earth or to receive payment, in the form of royalty, for the extraction of minerals.

+ References

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+ Details

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Period Type:	duration

- Definition

The cash outflow from the purchase of royalty interests in mining properties is the amount of cash the mineral producer pays the owner of the mine or mineral resource.

+ References

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Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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+ Details

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- Details

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- Details

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- Details

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Property and Equipment, Net (Details Narrative) - USD ($) $ in Thousands	1 Months Ended			9 Months Ended
	Nov. 30, 2025	Sep. 30, 2025	Aug. 31, 2025	Mar. 31, 2026	Mar. 31, 2025	Nov. 07, 2025	Aug. 01, 2025
Related Party Transaction [Line Items]
Construction in progress				$ 644	$ 0
August Property Purchases [Member]
Related Party Transaction [Line Items]
Property purchases amount			$ 2,699
Indirect costs			35
Land							$ 2,650
Payments to acquire mineral interests			$ 49
September Property Purchases [Member]
Related Party Transaction [Line Items]
Property purchases amount		$ 11,325
Indirect costs		29
Land		2,263
Payments to acquire mineral interests		$ 9,062
November Property Purchases [Member]
Related Party Transaction [Line Items]
Property purchases amount	$ 551
Indirect costs	51
Land						$ 20
Payments to acquire mineral interests	$ 531
Cash consideration						$ 500
Royalty rate						2.00%