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Credit Facility (Tables)
9 Months Ended
Dec. 31, 2012
Debt Disclosure [Abstract]  
Summary of activity on the Bank of America, N.A. line of credit

 

   Principal
Balance at March 31, 2012:  $1,700,000 
Borrowings   1,450,000 
Repayments   (250,000)
Balance at December 31, 2012:  $2,900,000