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Fair Value Disclosures (Details 1) (USD $)
Dec. 31, 2012
Mar. 31, 2012
Level 1
   
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash $ 4,666,656 $ 2,803,054
Finance receivables      
Line of credit      
Level 2
   
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash      
Finance receivables      
Line of credit 130,500,000 112,000,000
Level 3
   
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash      
Finance receivables 246,343,000 242,350,000
Line of credit      
Fair Value
   
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash 4,666,656 2,803,054
Finance receivables 246,343,000 242,350,000
Line of credit $ 130,500,000 $ 112,000,000