Significant Accounting Policies (Details) - USD ($) |
Jun. 30, 2019 |
Dec. 31, 2018 |
Dec. 31, 2017 |
|---|---|---|---|
| Assets | |||
| Cash equivalents | $ 5,066,830 | $ 6,788,333 | $ 8,872,982 |
| Restricted cash | 0 | 0 | 800,031 |
| Total | 5,066,830 | 6,788,333 | 9,673,013 |
| Level 1 | |||
| Assets | |||
| Cash equivalents | 5,066,830 | 6,788,333 | 8,872,982 |
| Restricted cash | 0 | 0 | 31 |
| Total | $ 5,066,830 | 6,788,333 | 8,873,013 |
| Level 2 | |||
| Assets | |||
| Cash equivalents | 0 | 0 | |
| Restricted cash | 0 | 800,000 | |
| Total | $ 0 | $ 800,000 |
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- References No definition available.
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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. Excludes cash and cash equivalents within disposal group and discontinued operation. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of 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. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of cash restricted as to withdrawal or usage. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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