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Short Term Investments Available for Sale - Schedule of Cost, Fair Value and Maturities of Short Term Investments (Details) - USD ($)	Dec. 31, 2018	Dec. 31, 2017
Short-term investments - Cost	$ 14,228,126	$ 12,734,184
Short-term investments - Fair Value	14,257,998	12,724,020
Short-term investment maturities - Within 3 months, cost	5,383,488
Short-term investment maturities - Between 3-12 months, cost	8,844,638	12,734,184
Total, cost	14,228,126	12,734,184
Short-term investment maturities - Within 3 months, fair value	5,393,743
Short-term investment maturities - Between 3-12 months, fair value	8,864,255	12,724,020
Total, fair value	14,257,998	12,724,020
Corporate Debt Securities [Member]
Short-term investments - Cost	14,228,126	12,734,184
Short-term investments - Fair Value	$ 14,257,998	$ 12,724,020

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- Definition

The current amount of amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

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Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in next rolling three to twelve months.

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Fair value of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in next rolling three to twelve months.

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Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale) with single maturity date and allocated without single maturity date, maturing in next rolling three months.

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Fair value of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in next rolling three months.

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Fair value of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date.

+ References

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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), classified as current.

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Amount of investments including trading securities, available-for-sale securities, held-to-maturity securities, and short-term investments classified as other and current.

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