Allowance for Doubtful Accounts Receivable and Sales Returns (Activity in Allowance for Doubtful Accounts Receivable and Sales Returns) (Detail) $ in Thousands	3 Months Ended
	Mar. 31, 2016 USD ($)
Allowance for Doubtful Accounts Receivable
Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning Balance	$ 765
Addition (reduction) to allowance	(20)
Amounts written off	(3)
Foreign currency translation	39
Ending Balance	781
Allowance for Sales Returns
Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning Balance	158
Addition (reduction) to allowance	20
Amounts written off	(3)
Foreign currency translation	0
Ending Balance	$ 175