v2.4.0.6

Note 5 - Customer and Supplier Concentrations (Detail) (USD $) | 3 Months Ended
--- | ---
Apr. 30, 2013 | Apr. 30, 2012
Fair Value, Concentration of Risk, Total Product Costs | $ 400,000 | $ 654,000
Cost of Revenue | 1,120,000 | 1,869,000
Cost of Goods, Total [Member] |  |
Cost of Revenue | $ 1,000,000 | $ 1,500,000

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

X
- Definition The aggregate cost of goods produced and sold and services rendered during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.2) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 2 -Article 5 + Details
Name: | us-gaap_CostOfRevenue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration