XML 63 R50.htm IDEA: XBRL DOCUMENT
v3.23.1

CASH, CASH EQUIVALENTS AND MARKETABLE SECURITIES - Marketable Securities (Details) - USD ($) $ in Thousands | Mar. 31, 2023 | Mar. 31, 2022
--- | --- | ---
Cash, Cash Equivalents and Marketable Securities [Line Items] |  |
Amortized Cost | $ 41,120 | $ 67,071
Unrealized Gains (Losses) | 24 | (34)
Fair Value | 41,144 | 67,037
Short-term marketable securities |  |
Cash, Cash Equivalents and Marketable Securities [Line Items] |  |
Amortized Cost | 32,205 | 67,071
Unrealized Gains (Losses) | (1) | (34)
Fair Value | 32,204 | 67,037
Long-term marketable securities |  |
Cash, Cash Equivalents and Marketable Securities [Line Items] |  |
Amortized Cost | 8,915 | 0
Unrealized Gains (Losses) | 25 | 0
Fair Value | 8,940 | 0
U.S. government and municipal obligations |  |
Cash, Cash Equivalents and Marketable Securities [Line Items] |  |
Fair Value | 17,735 | 40,863
U.S. government and municipal obligations | Short-term marketable securities |  |
Cash, Cash Equivalents and Marketable Securities [Line Items] |  |
Amortized Cost | 8,796 | 40,895
Unrealized Gains (Losses) | (1) | (32)
Fair Value | 8,795 | 40,863
U.S. government and municipal obligations | Long-term marketable securities |  |
Cash, Cash Equivalents and Marketable Securities [Line Items] |  |
Amortized Cost | 8,915 |
Unrealized Gains (Losses) | 25 |
Fair Value | 8,940 |
Commercial paper |  |
Cash, Cash Equivalents and Marketable Securities [Line Items] |  |
Fair Value | 19,136 | 23,353
Commercial paper | Short-term marketable securities |  |
Cash, Cash Equivalents and Marketable Securities [Line Items] |  |
Amortized Cost | 19,136 | 23,353
Unrealized Gains (Losses) | 0 | 0
Fair Value | 19,136 | 23,353
Corporate bonds |  |
Cash, Cash Equivalents and Marketable Securities [Line Items] |  |
Fair Value | 310 | 821
Corporate bonds | Short-term marketable securities |  |
Cash, Cash Equivalents and Marketable Securities [Line Items] |  |
Amortized Cost | 310 | 823
Unrealized Gains (Losses) | 0 | (2)
Fair Value | 310 | 821
Certificate of deposits |  |
Cash, Cash Equivalents and Marketable Securities [Line Items] |  |
Fair Value | 3,963 | 2,000
Certificate of deposits | Short-term marketable securities |  |
Cash, Cash Equivalents and Marketable Securities [Line Items] |  |
Amortized Cost | 3,963 | 2,000
Unrealized Gains (Losses) | 0 | 0
Fair Value | $ 3,963 | $ 2,000

X
- Definition Cash, Cash Equivalents and Marketable Securities [Line Items] + References No definition available. + Details
Name: | ntct_CashCashEquivalentsAndMarketableSecuritiesLineItems
Namespace Prefix: | ntct_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27161-111563 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 45 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=124258926&loc=SL82898722-210454 + Details
Name: | us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(6)) -URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 45 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=124258926&loc=SL82898722-210454 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=124260329&loc=d3e26610-111562 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (aa) -URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27161-111563 + Details
Name: | us-gaap_AvailableForSaleSecuritiesDebtSecurities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount, before tax, of unrealized gain (loss) in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References No definition available. + Details
Name: | us-gaap_DebtSecuritiesAvailableForSaleAccumulatedGrossUnrealizedGainLossBeforeTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_BalanceSheetLocationAxis=ntct_ShortTermMarketableSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BalanceSheetLocationAxis=ntct_LongTermMarketableSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_USGovernmentCorporationsAndAgenciesSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_CommercialPaperMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_CorporateDebtSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_CertificatesOfDepositMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |