v3.8.0.1

Accrued Liabilities - Narrative (Details) | Aug. 31, 2017
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Payables and Accruals [Abstract] |
Maximum percentage of total current liabilities included in accrued expenses | 5.00%
Maximum percentage of long-term liabilities included in accrued expenses | 5.00%

X
- Definition Maximum percentage of current liabilities at which all other liabilities individually did not exceed. + References No definition available. + Details
Name: | caw_MaximumPercentageOfCurrentLiabilities
Namespace Prefix: | caw_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Maximum Percent of Long-term Liabilities + References No definition available. + Details
Name: | caw_MaximumPercentofLongtermLiabilities
Namespace Prefix: | caw_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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