Commitments and Contingencies - Additional Information (Detail) - USD ($)	1 Months Ended		12 Months Ended
	Nov. 30, 2015	May. 31, 2015	Feb. 29, 2016	Feb. 28, 2015	Feb. 28, 2014
Commitments and Contingencies Disclosure [Abstract]
Operating lease arrangements expiration period			2021
Rent expense			$ 3,500,000	$ 3,100,000	$ 2,900,000
Loss Contingencies [Line Items]
Finite-Lived Intangible Assets, Net			39,192,000	8,921,000
Office Of Foreign Assets Control
Loss Contingencies [Line Items]
Settlement payments		$ 38,930
Bureau Of Industry And Security Legal Matters
Loss Contingencies [Line Items]
Settlement payments	$ 1,500,000
Settled Litigation | Intellectual Property Settlement
Loss Contingencies [Line Items]
Settlement payments			2,300,000
Patents
Loss Contingencies [Line Items]
Finite-Lived Intangible Assets, Net			1,704,000	$ 567,000
Patents | Intellectual Property Settlement
Loss Contingencies [Line Items]
Finite-Lived Intangible Assets, Net			$ 1,400,000