XML 72 R60.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Commitments and Contingencies (Narrative) (Details) - USD ($) $ in Millions | Nov. 30, 2018 | May 31, 2018
--- | --- | ---
Commitments and Contingencies [Abstract] |  |
Commitments to purchase capital assets | $ 4.4 | $ 6.7

X
- References No definition available. + Details
Name: | us-gaap_CommitmentsAndContingenciesDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of contractual obligation, including but not limited to, long-term debt, capital lease obligations, operating lease obligations, purchase obligations, and other commitments. + References No definition available. + Details
Name: | us-gaap_ContractualObligation
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant