Commitments and Contingencies - Additional Information (Detail) - USD ($)	1 Months Ended		12 Months Ended
	Nov. 30, 2015	May 31, 2015	Feb. 28, 2017	Feb. 29, 2016	Feb. 28, 2015
Commitments and Contingencies Disclosure [Abstract]
Operating lease arrangements expiration period			2021
Rent expense			$ 3,800,000	$ 3,500,000	$ 3,100,000
Loss Contingencies [Line Items]
Finite-Lived intangible assets, net			31,951,000	39,192,000
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			1,218,000	1,704,000
Patents | Intellectual Property Settlement
Loss Contingencies [Line Items]
Finite-Lived intangible assets, net				$ 1,400,000
C2C Systems Limited
Loss Contingencies [Line Items]
Business combination, contingent consideration arrangements, agreed amount to be paid			$ 1,250,000