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Significant Accounting Policies (Details) - USD ($) | 1 Months Ended | 3 Months Ended |  |
--- | --- | --- | --- | ---
May 13, 2019 | Mar. 31, 2019 | Jan. 01, 2019 | Dec. 31, 2018
Significant Account Policies [Line Items] |  |  |  |
Cash equivalents |  | $ 5,500,000 |  | $ 5,800,000
Restricted cash |  | 7,300,000 |  | $ 4,000,000
Asset impairment charge |  | 0 |  |
Lease liabilities |  | $ 514,015 |  |
Accounting Standards Update 2016-02 [Member] |  |  |  |
Significant Account Policies [Line Items] |  |  |  |
Right-of-use assets |  |  | $ 514,000 |
Lease liabilities |  |  | $ 514,000 |
Common Class A [Member] | Subsequent Event [Member] |  |  |  |
Significant Account Policies [Line Items] |  |  |  |
Dividend per share declared | $ 0.06 |  |  |
Dividend payable, date | May 31, 2019 |  |  |
Dividends payable, date of record | Apr. 01, 2019 |  |  |

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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. + References Reference 1: 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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