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Related Party Transactions	12 Months Ended
	Sep. 30, 2017
Related Party Transactions [Abstract]
Related Party Transactions	Related Party Transactions During the normal course of business, the Company sold products to a company whose Board of Directors included two members of CSP Inc.'s Board of Directors. The total sales were $283 thousand for the fiscal year ended 2016. The trade receivable was $64 thousand thousand as of September 30, 2016. CSP Inc's two board members were no longer board members of the same company at the end of fiscal year 2017.

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No definition available.

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- Definition

The entire disclosure for related party transactions. Examples of related party transactions include transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners; and (d) affiliates.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 850
-URI http://asc.fasb.org/topic&trid=2122745

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