Stockholders' Equity - Additional Information - Warrants (Detail)	9 Months Ended
Sep. 30, 2016 shares
Class Of Warrant Or Right [Line Items]
Warrants issued	521,060
Number of exercised warrants	0
Warrants outstanding	1,994,941
Exercisable Warrants [Member]
Class Of Warrant Or Right [Line Items]
Warrants outstanding	1,994,941

Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(i)(2))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

Name:	us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant