Balance Sheet Components - Components of Accrued Liabilities (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Accrued Liabilities [Abstract]
Payroll and employee-related expenses	$ 2,907	$ 3,779
Inventory received not invoiced	2,744	4,038
Accrued trade expenses	1,898	2,469
Income tax payable	1,727	0
Brokerage commissions	421	407
Deferred rent	244	260
Other accrued liabilities	739	1,238
Total accrued liabilities	$ 10,680	$ 12,191	[1]

[1] Includes an immaterial reclassification between accounts receivable and accrued liabilities.