Other Current Liabilities - Additional Information (Detail) - Hercules Capital, Inc., [Member] - Secured Loan Agreement [Member]	Aug. 01, 2016 $ / shares shares
Class Of Warrant Or Right [Line Items]
Loan agreement date	Aug. 01, 2016
Common stock per share upon exercise of warrants \| $ / shares	$ 3.50
Issuable common stock upon exercise of warrants \| shares	357,142
Warrants expiration date	Aug. 01, 2023

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://fasb.org/us-gaap/role/ref/legacyRef
-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