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Pension and Retirement Plans (Detail) | 9 Months Ended
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Jun. 30, 2013
Compensation and Retirement Disclosure [Abstract] |
Number of years defined benefit plans are closed to newly hired employees | 2 years

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- Definition Number of years that all of the Company's defined benefit plans are closed to newly hired employees. + References No definition available. + Details
Name: | cspi_NumberOfYearsDefinedBenefitPlansAreClosedToNewlyHiredEmployees
Namespace Prefix: | cspi_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_CompensationAndRetirementDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration