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Summary of Significant Accounting Policies (Detail Textuals 4)
 12 Months Ended
Mar. 31, 2015
Significant Accounting Policies [Line Items]  
Number of states in which entity operates 16us-gaap_NumberOfStatesInWhichEntityOperates
Number of branches 66nick_NumberOfBranches
Finance receivables  
Significant Accounting Policies [Line Items]  
Concentration benchmark Of the remaining twelve states, no one state represented more than 5% of the total finance receivables.
Finance receivables | Florida  
Significant Accounting Policies [Line Items]  
Concentration risk percentage 32.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_FinanceReceivablesMember
/ us-gaap_StatementGeographicalAxis
= stpr_FL
Finance receivables | Ohio  
Significant Accounting Policies [Line Items]  
Concentration risk percentage 14.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_FinanceReceivablesMember
/ us-gaap_StatementGeographicalAxis
= stpr_OH
Finance receivables | Georgia  
Significant Accounting Policies [Line Items]  
Concentration risk percentage 10.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_FinanceReceivablesMember
/ us-gaap_StatementGeographicalAxis
= stpr_GA
Finance receivables | North Carolina  
Significant Accounting Policies [Line Items]  
Concentration risk percentage 9.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_FinanceReceivablesMember
/ us-gaap_StatementGeographicalAxis
= stpr_NC