Quarterly report pursuant to Section 13 or 15(d)

Balance Sheet Components - Additional Information (Detail)

v3.7.0.1
Balance Sheet Components - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Dec. 31, 2016
Balance Sheet Related Disclosures [Abstract]      
Inventory write down related to corporate restructuring $ 0 $ 1,662  
Depreciation and amortization expense 300 400  
Amortization of intangible assets 100 $ 200  
Finite-Lived Intangible Assets, Gross 2,244   $ 2,244
Finite-Lived intangible assets, net $ 1,558   $ 1,638