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Subsequent Events (Details Textual) (Subsequent Event [Member], USD $) | 6 Months Ended
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Oct. 31, 2013
Subsequent Event [Member] |
License Agreement Aggregate Payment | $ 1,875,000
License Agreement Due Upon Execution | 937,500
License Agreement Paid Upon Successful Delivery | $ 937,500

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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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Namespace Prefix: | csbr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration