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