Annual report pursuant to Section 13 and 15(d)

Balance Sheet Details - Accrued Expenses (Detail)

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Balance Sheet Details - Accrued Expenses (Detail) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Capitalized Contract Cost [Line Items]    
Accrued technology license payments $ 4,500 $ 4,500
Accrued professional fees 1,270 1,497
Accrued engineering and production costs 646 2,378
Accrued restructuring 1,946 3,039
Accrued royalty 980 1,206
Accrued Rent, Current 1,214 1,105
Accrued customer credits 1,204 2,667
Taxes Payable 1,642 0
Contract with Customer, Liability 71  
Other 995 3,914
Total 23,520 $ 20,306
Reduction in Transaction Price [Member]    
Capitalized Contract Cost [Line Items]    
Customer Refund Liability, Current 7,558  
Sales Returns and Allowances [Member]    
Capitalized Contract Cost [Line Items]    
Accrued obligations to customers for stock rotation rights $ 1,494