Basis of Presentation and Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($)	6 Months Ended
Jun. 30, 2016	Dec. 31, 2015
Accounting Policies [Abstract]
Cash denominated in foreign currencies	$ 140,003	$ 924,554
Cash denominated in foreign currencies, proceeds	$ 157,934	$ 943,684
Income tax examination, description	No income tax returns are currently under examination. The 2012 through 2015 tax years remain subject to examination by U.S. federal and most state tax authorities.

A brief description of status of the tax examination, significant findings to date, and the entity's position with respect to the findings.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (d)(2)
-URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32718-109319

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