Related Party Transactions (Detail Textuals) - USD ($)	12 Months Ended
Dec. 31, 2017	Dec. 31, 2016
Board Of Directors
Related Party Transaction [Line Items]
Legal fees and disbursements	$ 205,000	$ 109,000

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration