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Finance Receivables (Detail Textuals 2) | 12 Months Ended
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Mar. 31, 2013
Receivables [Abstract] |
Maximum criteria for receivable to be a performing account | 60 days
Minimum criteria for receivable to be a non-performing account | 60 days
Criteria for receivable to be delinquent account | 120 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 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
- Details
Name: | us-gaap_ReceivablesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration