XML 28 R81.htm IDEA: XBRL DOCUMENT v2.4.1.9

Segment Information (Detail) - Major customers (USD $) In Millions, unless otherwise specified	12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Customer A
Revenue, Major Customer [Line Items]
Amount (in Dollars)	$ 15.2us-gaap_Revenues / us-gaap_MajorCustomersAxis = cspi_CustomerAMember	$ 15.7us-gaap_Revenues / us-gaap_MajorCustomersAxis = cspi_CustomerAMember
% of Revenues	18.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_MajorCustomersAxis = cspi_CustomerAMember	18.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_MajorCustomersAxis = cspi_CustomerAMember
Customer B
Revenue, Major Customer [Line Items]
Amount (in Dollars)	15.7us-gaap_Revenues / us-gaap_MajorCustomersAxis = cspi_CustomerBMember	13.4us-gaap_Revenues / us-gaap_MajorCustomersAxis = cspi_CustomerBMember
% of Revenues	19.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_MajorCustomersAxis = cspi_CustomerBMember	15.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_MajorCustomersAxis = cspi_CustomerBMember
Customer C
Revenue, Major Customer [Line Items]
Amount (in Dollars)	$ 0.2us-gaap_Revenues / us-gaap_MajorCustomersAxis = cspi_CustomerCMember	$ 10.5us-gaap_Revenues / us-gaap_MajorCustomersAxis = cspi_CustomerCMember
% of Revenues	0.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_MajorCustomersAxis = cspi_CustomerCMember	12.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_MajorCustomersAxis = cspi_CustomerCMember

X

- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 21

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=28364263&loc=d3e13537-108611



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 275

-SubTopic 10

-Section 50

-Paragraph 20

-URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6404-108592



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 20

-URI http://asc.fasb.org/extlink&oid=28364263&loc=d3e13531-108611



Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 275

-SubTopic 10

-Section 50

-Paragraph 18

-URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6351-108592

+ Details

Name:	us-gaap_ConcentrationRiskPercentage1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_EntityWideRevenueMajorCustomerLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

+ 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 210.5-03.1)

-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 1

-Article 5

+ Details

Name:	us-gaap_Revenues
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Details

Name:	us-gaap_MajorCustomersAxis=cspi_CustomerAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_MajorCustomersAxis=cspi_CustomerBMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_MajorCustomersAxis=cspi_CustomerCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: