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Balance Sheet Details - Schedule of Acquired Intangible Assets by Major Asset Class (Detail)
$ in Thousands
12 Months Ended
Dec. 31, 2016
USD ($)
Finite-Lived Intangible Assets [Line Items]  
Gross $ 1,353
Accumulated amortization (197)
Net book value before impairment 1,156
Impairment charge (411)
Net book value 745
Purchased Technology [Member]  
Finite-Lived Intangible Assets [Line Items]  
Gross 265
Accumulated amortization (32)
Net book value before impairment 233
Net book value $ 233
Purchased Technology [Member] | Minimum [Member]  
Finite-Lived Intangible Assets [Line Items]  
Useful life 5 years
Purchased Technology [Member] | Maximum [Member]  
Finite-Lived Intangible Assets [Line Items]  
Useful life 6 years
Customer Relationships [Member]  
Finite-Lived Intangible Assets [Line Items]  
Gross $ 999
Accumulated amortization (147)
Net book value before impairment 852
Impairment charge (411)
Net book value $ 441
Customer Relationships [Member] | Minimum [Member]  
Finite-Lived Intangible Assets [Line Items]  
Useful life 3 years
Customer Relationships [Member] | Maximum [Member]  
Finite-Lived Intangible Assets [Line Items]  
Useful life 6 years
Trademarks/Trade Names [Member]  
Finite-Lived Intangible Assets [Line Items]  
Useful life 2 years
Gross $ 38
Accumulated amortization (9)
Net book value before impairment 29
Net book value $ 29
Non-Compete [Member]  
Finite-Lived Intangible Assets [Line Items]  
Useful life 3 years
Gross $ 51
Accumulated amortization (9)
Net book value before impairment 42
Net book value $ 42