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Cash, Cash Equivalents, Short-Term Investments and Long-Term Investments (Tables) | 12 Months Ended
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Dec. 31, 2016
Cash, Cash Equivalents, Short-Term Investments and Long-Term Investments [Abstract] |
Schedule of cash, cash equivalents and short-term investments and long-term investments |
|  | As of December 31, |  |  | Increase |
|  | 2016 |  |  | 2015 |  |  | (Decrease) |
Cash and cash equivalents |  | $ | 5,150,344 |  |  | $ | 1,573,328 |  |  | $ | 3,577,016 |
Short-term investments |  |  | 5,474,013 |  |  |  | 4,470,574 |  |  |  | 1,003,439 |
Subtotal |  |  | 10,624,357 |  |  |  | 6,043,902 |  |  |  | 4,580,455 |
Long-term investments |  |  | - |  |  |  | 489,648 |  |  |  | (489,648 | )
Total |  | $ | 10,624,357 |  |  | $ | 6,533,550 |  |  | $ | 4,090,807
Schedule of held to maturity securities |
|  | As of December 31, |
|  | 2016 |  |  | 2015 |
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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