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Balance Sheet Components - Summary of Property and Equipment Net (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 1,875	$ 1,640
Less: accumulated depreciation and amortization	(1,313)	(1,031)
Property and equipment, net	562	609
Laboratory Equipment [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment	1,650	1,452
Furniture and Computer Equipment [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment	163	140
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 62	$ 48

X

- Definition

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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- Definition

Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

+ References

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+ References

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