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Significant Customers | 12 Months Ended
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Apr. 30, 2014
Significant Customer [Abstract] |
Significant Customer [Text Block] | Note 4. Significant Customers For the year ended April 30, 2014, three of our customers accounted for more than 10.0% of our total revenue in the amount of $1.6 million, $1.5 million and $1.5 million. The revenue from these customers is captured in the TOS revenue line item within the income statement.

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Name: | csbr_SignificantCustomerAbstract
Namespace Prefix: | csbr_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition The entire disclosure for all significant customers of the reporting entity. + References No definition available. + Details
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Namespace Prefix: | csbr_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration