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Available-for-Sale-Securities Available-for-sale Securities by Contractual Maturity (Details)
Mar. 31, 2017
USD ($)
Available-for-sale Securities [Abstract]  
Amortized Cost $ 1,430,400
Available-for-sale Securities, Debt Maturities, Remainder of Fiscal Year, Amortized Cost Basis 1,430,400
Available-for-sale Securities, Debt Maturities, Year Two Through Five, Amortized Cost Basis 0
Available-for-sale Securities, Noncurrent 0
Estimated Fair Value $ 1,430,400