XML 66 R52.htm IDEA: XBRL DOCUMENT
v3.22.2.2

Income Taxes - Unrecognized Roll Forward (Details) - USD ($) | 12 Months Ended
--- | ---
Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2020
Reconciliation of unrecognized tax benefits: |  |  |
Gross unrecognized, ending | $ 678,000 | $ 678,000 | $ 866,000
Increase (Decrease) In unrecognized tax benefits from deemed dividends for investments in US property | 0 | (3,000) | 682,000
Increases to unrecognized tax benefits resulting from the generation of additional R&D credits |  |  | 59,000
Decrease to unrecognized tax benefits resulting from settled IRS audit |  | (185,000) |
Gross unrecognized, beginning | 678,000 | 866,000 | 125,000
Interest |  |  |
Unrecognized interest, beginning | 63,000 | 83,000 | 0
Unrecognized benefits interest accrual, increase from deemed dividends | 25,000 |  | 83,000
Unrecognized benefits interest accrual, decrease from deemed dividends |  | (20,000) |
Unrecognized interest, ending | 88,000 | 63,000 | 83,000
Total |  |  |
Total unrecognized benefits and accrued interest, beginning | 741,000 | 949,000 | 125,000
Increase (decrease) to unrecognized tax benefits and accrued interest for deemed dividends | (25,000) | (23,000) | 765,000
Increases to unrecognized tax benefits resulting from the generation of additional R&D credits |  |  | 59,000
Decrease to unrecognized tax benefits resulting from settled IRS audit |  | (185,000) |
Total unrecognized benefits and accrued interest, ending | $ 766,000 | $ 741,000 | $ 949,000

X
- Definition The amount of increase or decrease to unrecognized tax benefits resulting from deemed dividends for investments in US property. + References No definition available. + Details
Name: | nssc_IncreaseDecreaseInUnrecognizedTaxBenefitsFromDeemedDividendsForInvestmentsInUsProperty
Namespace Prefix: | nssc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of interest in deemed dividends from investments. + References No definition available. + Details
Name: | nssc_IncreaseDecreaseToUnrecognizedTaxBenefitsIncludingInterest
Namespace Prefix: | nssc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition n/a + References No definition available. + Details
Name: | nssc_ReconciliationOfUnrecognizedTaxBenefitsIncludingAmountsPertainingToExaminedReturnsAbstract
Namespace Prefix: | nssc_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of interest credit for an overpayment of income taxes. + References No definition available. + Details
Name: | nssc_UnrecognizedTaxBenefitInterestCreditOnIncomeTaxes
Namespace Prefix: | nssc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Unrecognized tax benefits including prior examinations. + References No definition available. + Details
Name: | nssc_UnrecognizedTaxBenefitsIncludingAmountsPertainingToExaminedTaxReturns
Namespace Prefix: | nssc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
Name: | us-gaap_ReconciliationOfUnrecognizedTaxBenefitsExcludingAmountsPertainingToExaminedTaxReturnsRollForward
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of unrecognized tax benefits. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 45 -Paragraph 10B -URI https://asc.fasb.org/extlink&oid=123427490&loc=SL37586934-109318 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=121826272&loc=SL6600010-109319 + Details
Name: | us-gaap_UnrecognizedTaxBenefits
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of decrease in unrecognized tax benefits resulting from settlements with taxing authorities. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a)(3) -URI https://asc.fasb.org/extlink&oid=121826272&loc=SL6600010-109319 + Details
Name: | us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount accrued for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32718-109319 + Details
Name: | us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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

X
- Definition Amount of increase in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a)(2) -URI https://asc.fasb.org/extlink&oid=121826272&loc=SL6600010-109319 + Details
Name: | us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of interest expense for an underpayment of income taxes. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32718-109319 + Details
Name: | us-gaap_UnrecognizedTaxBenefitsInterestOnIncomeTaxesExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration