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Finance Receivables (Details 2) (USD $)
 3 Months Ended 6 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Financing Receivable, Allowance for Credit Losses [Roll Forward]        
Balance at beginning of period     $ 35,987,868  
Current period provision 308,340 178,029 318,712 257,444
Balance at end of period 34,631,762   34,631,762  
Finance receivables | Consumer Loan
        
Financing Receivable, Allowance for Credit Losses [Roll Forward]        
Balance at beginning of period 561,803 447,271 492,184 378,418
Current period provision 14,723 68,513 104,313 148,736
Losses absorbed (49,103) (32,648) (74,195) (51,094)
Recoveries 3,678 6,842 8,799 13,918
Balance at end of period $ 531,101 $ 489,978 $ 531,101 $ 489,978