Aggregate share number for all nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) held by stockholders. Does not include preferred shares that have been repurchased.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(28))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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

Net Loss Per Share - Additional Information (Detail) - shares	Jun. 15, 2016	Apr. 14, 2016	Jun. 30, 2016	Dec. 31, 2015
Earnings Per Share [Abstract]
Preferred stock issued pursuant to Private Placement		2,959,300
Preferred stock issued pursuant to Subsequent Financing	2,959,300
Preferred stock, shares outstanding			0	0