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Cash, Cash Equivalents, Short-Term Investments and Long-Term Investments (Details 1) - USD ($)	Dec. 31, 2016	Dec. 31, 2015
Schedule of held to maturity securities
Amortized cost	$ 5,450,000	$ 4,951,000
Accrued interest	24,013	9,222
Gross unrealized gains	2,073	25
Gross unrealized losses	(59)	(6,277)
Estimated fair value	$ 5,476,027	$ 4,953,970

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Amount after other than temporary impairment (OTTI) accretion, of investments in debt securities classified as held-to-maturity.

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