Related Party Transactions	12 Months Ended
Sep. 30, 2012
Related Party Transactions [Abstract]
Related Party Transactions	16. Related Party Transactions: In February 2012, OYO USA sold its remaining ownership stake in the Company and, subsequently, the Company is no longer affiliated with OYO USA or OYO Japan. In this regard, effective October 1, 2012, the Company changed its name from OYO Geospace Corporation to Geospace Technologies Corporation. Sales to OYO Japan and other affiliated companies were $0.2 million (prior to the stock sale), $1.3 million and $0.8 million during fiscal years 2012, 2011 and 2010, respectively. Purchases of inventory from OYO Japan and other affiliated companies were $15,000 (prior to the stock sale), $0.2 million and $0.2 million in fiscal years 2012, 2011 and 2010, 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.

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