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Accrued Liabilities (Details) - USD ($) $ in Thousands	May 31, 2016	Nov. 30, 2015	May 31, 2015	Feb. 28, 2015	Nov. 30, 2014	Aug. 31, 2014	May 31, 2014	May 31, 2013
Accrued liabilities
Payroll and related expenses	$ 9,414		$ 10,297
Royalties	2,489		2,237
Accrued severance	1,524		158
Sales and franchise taxes	565		489
Interest rate swap liability	0		257
Outside services	2,063		1,522
Deferred Rent	35		808
Other	5,806		2,341
Total	$ 21,896	$ 16,858	$ 18,109	$ 19,485	$ 18,589	$ 17,522	$ 15,940	$ 15,961

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Carrying value as of the balance sheet date of obligations incurred through that date and payable for professional fees, such as for legal and accounting services received.

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Total of the carrying values as of the balance sheet date of obligations incurred through that date and payable for obligations related to services received from employees, such as accrued salaries and bonuses, payroll taxes and fringe benefits. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Carrying amount as of the balance sheet date of known and estimated obligations associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, which are expected to be paid in the next twelve months or in the normal operating cycle if longer. Costs of such activities include those for one-time termination benefits, termination of an operating lease or other contract, consolidating or closing facilities, relocating employees, and costs associated with an ongoing benefit arrangement, but excludes costs associated with the retirement of a long-lived asset.

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