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v3.25.3

TAXES - Valuation Allowance (Details) - USD ($) | 6 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2025 | Mar. 31, 2024 | Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2022
Valuation allowance roll forward |  |  |  |  |
Beginning balance | $ 215,526 | $ 21,910 | $ 21,910 | $ 133,333 | $ 178,259
Additions | 56,808 | 196 | 192,863 | 257 | 37
Reversals | (6,379) |  | (5,111) | (112,043) | (30,597)
Foreign currency translation adjustments | (7,282) | 229 | 5,864 | 363 | (14,366)
Ending balance | $ 258,673 | $ 22,336 | $ 215,526 | $ 21,910 | $ 133,333

X
- Definition Amount of decrease in the valuation allowance for a specified deferred tax asset due to reversals in the period. + References No definition available. + Details
Name: | ntcl_ValuationAllowanceDeferredTaxAssetDecreaseDueToReversalsAmount
Namespace Prefix: | ntcl_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of increase (decrease) in the valuation allowance for a specified deferred tax asset due to foreign currency translation adjustments. + References No definition available. + Details
Name: | ntcl_ValuationAllowanceDeferredTaxAssetIncreaseDecreaseDueToForeignCurrencyTranslationsAmount
Namespace Prefix: | ntcl_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of increase in the valuation allowance for a specified deferred tax asset due to additions in the period. + References No definition available. + Details
Name: | ntcl_ValuationAllowanceDeferredTaxAssetIncreaseDueToAdditionsAmount
Namespace Prefix: | ntcl_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-2 + Details
Name: | us-gaap_DeferredTaxAssetsValuationAllowance
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_ValuationAllowanceAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration