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Subsequent Events (Details) - USD ($) |  | 6 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Aug. 02, 2017 | Jun. 30, 2017 | Dec. 31, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2015
Subsequent Events (Textual) |  |  |  |  |  |
Offering price |  | $ 1.47 |  |  |  |
Cash and cash equivalents |  | $ 11,456,272 | $ 20,519,294 | $ 20,455,248 | $ 22,206,956 | $ 25,643,273
Subsequent Events [Member] |  |  |  |  |  |
Subsequent Events (Textual) |  |  |  |  |  |
Public offering of shares | 21,500,000 |  |  |  |  |
Gross proceeds of offering amount | $ 16,100,000 |  |  |  |  |
Exercise price | $ 1.05 |  |  |  |  |
Offering price | $ 0.75 |  |  |  |  |
Subsequent event, description | On August 2, 2017, the Company completed an underwritten public offering of 21,500,000 shares of its common stock and warrants to purchase an aggregate of 18,275,000 shares of the Company’s common stock at an offering price to the public of $0.75 per share and related warrant. The warrants have an exercise price of $1.05 per share and have a term of five years. |  |  |  |  |
Stock options, vesting period | 5 years |  |  |  |  |
Cash and cash equivalents | $ 24,000,000 |  |  |  |  |
Employee [Member] |  |  |  |  |  |
Subsequent Events (Textual) |  |  |  |  |  |
Issuance common shares to an employee for vested grant |  | 1,500 |  |  |  |

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- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=82887183&loc=d3e6676-107765 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3044-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.1) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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