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Consolidated Financial Statements - Additional Information (Detail) $ in Thousands		3 Months Ended		6 Months Ended		35 Months Ended
	Sep. 19, 2013 USD ($)	Nov. 30, 2015 USD ($)	Nov. 30, 2014 USD ($)	Nov. 30, 2015 USD ($)	Nov. 30, 2014 USD ($)	Nov. 30, 2015 USD ($)
Recent Developments [Line Items]
Medical device excise tax		$ 978	$ 1,076	$ 1,981	$ 2,071	$ 11,600
Ratio for debt service coverage	1.35
Ratio of indebtedness to consolidated EBITDA	3.75
New Credit Agreement [Member]
Recent Developments [Line Items]
Percentage of increase in interest	2.00%
New Credit Agreement [Member] | Term Loan Facility [Member]
Recent Developments [Line Items]
Senior secured term loan facility	$ 100,000
Term loan quarterly repayment, year one	5.00%
Term loan quarterly repayment, year two	5.00%
Term loan quarterly repayment, year three	10.00%
Term loan quarterly repayment, year four	15.00%
Term loan quarterly repayment, year five	65.00%
New Credit Agreement [Member] | Senior Secured Revolving Credit Facility [Member]
Recent Developments [Line Items]
Senior secured term loan facility	$ 100,000
New Credit Agreement [Member] | Senior Secured Revolving Credit Facility [Member] | Minimum [Member]
Recent Developments [Line Items]
Commitment fee, percentage	0.20%
New Credit Agreement [Member] | Senior Secured Revolving Credit Facility [Member] | Maximum [Member]
Recent Developments [Line Items]
Commitment fee, percentage	0.35%
New Credit Agreement [Member] | Letters of Credit [Member]
Recent Developments [Line Items]
Senior secured term loan facility	$ 20,000
New Credit Agreement [Member] | Swingline Loans [Member]
Recent Developments [Line Items]
Senior secured term loan facility	5,000
New Credit Agreement [Member] | Revolving Credit Facility [Member]
Recent Developments [Line Items]
Initial amount borrowed under revolving facility	$ 41,400
New Credit Agreement [Member] | Base Rate [Member] | JP Morgan Chase [Member]
Recent Developments [Line Items]
Percentage of increases leverage ratio base rate, minimum	0.50%
Percentage of increases leverage ratio base rate, maximum	1.25%
New Credit Agreement [Member] | Eurodollar [Member] | JP Morgan Chase [Member]
Recent Developments [Line Items]
Percentage of increases leverage ratio base rate, minimum	1.50%
Percentage of increases leverage ratio base rate, maximum	2.25%
Trademarks [Member]
Recent Developments [Line Items]
Trademark impairment				$ 6,400

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