Related Party Transactions	12 Months Ended
Related Party Transactions	Sep. 30, 2016
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 $283 thousand and $314 thousand, for the fiscal years ended 2016 and 2015, respectively. The trade receivables were $64 thousand and $13 thousand as of September 30, 2016 and 2015, 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.