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Finance Receivables (Detail Textuals 1) - USD ($) $ in Millions |  | 9 Months Ended
--- | --- | ---
Dec. 31, 2023 | Dec. 31, 2023
Accounts Notes And Loans Receivable [Line Items] |  |
Maximum criteria for receivable to be a performing account |  | 61 days
Finance receivablesheld for sale valuation allowance | $ 19.5 |
Percentage of more than payment contractually for delinquent |  | 10.00%
Minimum criteria for receivable to be a non-performing account |  | 61 days
Minimum |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Criteria for receivable to be delinquent account |  | 121 days

X
- Definition This element represents the number of days after which the receivable account is considered as delinquent account which will be written off. + References No definition available. + Details
Name: | nick_DelinquentAccountCriteriaPeriod
Namespace Prefix: | nick_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition This element represents the number of days after which the receivable account is considered as non- performing account. + References No definition available. + Details
Name: | nick_NonPerformingAccountCriteriaMinimumPeriod
Namespace Prefix: | nick_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents percentage of payment contractually for delinquent. + References No definition available. + Details
Name: | nick_PercentageOfPaymentContractuallyForDelinquent
Namespace Prefix: | nick_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition This element represents the number of days before which the receivable account is considered as performing account. + References No definition available. + Details
Name: | nick_PerformingAccountCriteriaMaximumPeriod
Namespace Prefix: | nick_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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

X
- Definition Amount of expense for valuation allowance on financing receivable transferred to held-for-sale classification. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481990/310-10-45-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 948 -SubTopic 310 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481852/948-310-45-2 + Details
Name: | us-gaap_FinancingReceivableTransferToHeldForSaleValuationAllowanceExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |