v2.4.0.8

Note 6 - Customer and Supplier Concentrations (Details) - Supplier Concentration Risk Accounts Receivable (USD $) In Thousands, unless otherwise specified | Apr. 30, 2014 | Jan. 31, 2014
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Note 6 - Customer and Supplier Concentrations (Details) - Supplier Concentration Risk Accounts Receivable [Line Items] |  |
Total gross accounts receivable due from suppliers | $ 128 | $ 128
Total gross accounts receivable due from suppliers | 100.00% | 100.00%
Customer concentration: |  |
Balance | 122 | 122
Percentage | 95.00% | 95.00%
Zheng Ge Electrical Company Ltd [Member] |  |
Customer concentration: |  |
Balance | $ 122 | $ 122
Percentage | 95.00% | 95.00%

X
- Definition Accounts receivable due from suppliers gross current. + References No definition available. + Details
Name: | cmro_AccountsReceivableDueFromSuppliersGrossCurrent
Namespace Prefix: | cmro_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Accounts receivable due from suppliers gross current percentage. + References No definition available. + Details
Name: | cmro_AccountsReceivableDueFromSuppliersGrossCurrentPercentage
Namespace Prefix: | cmro_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | cmro_CustomerConcentrationAbstract0
Namespace Prefix: | cmro_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition No authoritative reference available. + References No definition available. + Details
Name: | cmro_MajorSuppliersAccountsReceivableGrossCurrent
Namespace Prefix: | cmro_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition No authoritative reference available. + References No definition available. + Details
Name: | cmro_MajorSuppliersAccountsReceivableGrossPercentage
Namespace Prefix: | cmro_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | cmro_Note6CustomerandSupplierConcentrationsDetailsSupplierConcentrationRiskAccountsReceivableLineItems
Namespace Prefix: | cmro_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration