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6. Credit Facility - Summary of activity on the Bank of America, N.A. line of credit (Details) (USD $)
9 Months Ended
Dec. 31, 2014
Notes to Financial Statements  
Balance at beginning of period: $ 2,425,000us-gaap_LineOfCredit
Borrowings 3,475,000us-gaap_ProceedsFromLinesOfCredit
Repayments (150,000)us-gaap_RepaymentsOfLinesOfCredit
Balance at end of period: $ 5,750,000us-gaap_LineOfCredit