Acquisitions - NAMSA (Details) - USD ($) $ in Thousands			12 Months Ended
		Mar. 01, 2016	Jul. 31, 2016
North American Science Associates Inc
Business Acquisition [Line Items]
Total consideration for the transaction, excluding acquisition-related costs	[1]	$ 13,424	$ 13,424

[1] The excess purchase price over net assets acquired was assigned to goodwill, all of which is deductible for income tax purposes.