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Liquidity (Details Textual) - USD ($) | 1 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Aug. 31, 2019 | Apr. 30, 2019 | Jul. 01, 2019 | Jun. 30, 2019 | Dec. 31, 2018 | Jun. 30, 2018 | Dec. 31, 2017
Liquidity [Line Items] |  |  |  |  |  |  |
Cash and cash equivalents |  |  |  | $ 173,902 | $ 1,368,395 | $ 3,020,614 | $ 4,870,824
Cash backlog |  |  |  | $ 70,800,000 |  |  |
Net proceeds |  | $ 552,709 |  |  |  |  |
Subsequent Event [Member] |  |  |  |  |  |  |
Liquidity [Line Items] |  |  |  |  |  |  |
Net proceeds | $ 587,000 |  |  |  |  |  |
Bid price, per share |  |  | $ 1.00 |  |  |  |
Minimum bid price |  |  | 1.00 |  |  |  |
Closing bid price |  |  | $ 1.00 |  |  |  |

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- Definition Closing bid price, per share + References No definition available. + Details
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- Definition Minimum bid price, per share. + References No definition available. + Details
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- Definition Bid price, per share. + References No definition available. + Details
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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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3044-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -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 3: http://fasb.org/us-gaap/role/ref/legacyRef -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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- Definition Amount of cash inflow from the issuance of equity classified as other. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3255-108585 + Details
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