v3.5.0.2

Note 8 - Fair Value Measurements - Fair Value of Financial Assets and Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Jun. 30, 2016
Fair Value, Inputs, Level 2 [Member]
Fuel derivatives	$ 48	$ (95)
Fuel derivatives	$ 48	$ (95)

X

- Definition

Fair value portion of asset contracts related to fuel derivatives.

+ References

No definition available.

+ Details

Name:	cgi_FuelDerivativesContractAssetFairValueDisclosure
Namespace Prefix:	cgi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Details

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel2Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: