Related Party Transactions	12 Months Ended
Related Party Transactions	Sep. 30, 2015
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 includes two members of CSP Inc.'s Board of Directors. The total sales were $313,637 and $161,348, for the fiscal years ended 2015 and 2014, respectively. The trade receivables were $12,540 and $29,260 as of September 30, 2015 and 2014. respectively.

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.