Accrued Liabilities and Other Long-Term Liabilities - Schedule of Accrued Liabilities (Detail) - USD ($) $ in Thousands	Oct. 31, 2015	Jan. 31, 2015
Payables And Accruals [Abstract]
Accrued employee compensation	$ 12,329	$ 11,318
Accrued warranty	143	203
Accrued rebates	657	254
Accrued product development costs	3,683	5,004
Other accrued liabilities	1,512	1,920
Total accrued liabilities	$ 18,324	$ 18,699