Note 14 - Other Long-term Liabilities (Details) - USD ($) $ in Thousands	May 31, 2016	May 31, 2015
Contingent consideration liability	$ 40,350	$ 18,526
Unrecognized tax benefits	15,191	9,066
Severance indemnity for employees	1,273	1,223
Deferred leasehold improvement incentive		145
Other liabilities	606	252
Other long-term liabilities	$ 57,420	$ 29,212