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6. Credit Facility - Summary of activity on the Bank of America, N.A. line of credit (Details)
3 Months Ended
Jun. 30, 2015
USD ($)
Debt Disclosure [Abstract]  
Balance at April 1, 2015: $ 5,950,000
Borrowings $ 200,000
Repayments  
Balance at June 30, 2015: $ 6,150,000