Legal Proceedings	9 Months Ended
Jun. 30, 2011
Legal Proceedings
Legal Proceedings	11. Legal Proceedings On July 8, 2009, the Company received a complaint filed in the United States District Court in Nevada alleging that the Geospace Seismic Recorder ("GSR"), the Company's newly developed wireless data acquisition system, infringes a patent held by Ascend Geo, LLC ("Ascend"). The Company requested and was granted a change in venue to the United States District Court for the Southern District of Texas in Houston (the "Court"). In addition to monetary damages, Ascend requested a preliminary injunction against future sales by the Company of the GSR nodal system. The Company filed its response with the Court requesting that it deny Ascend's request for a preliminary injunction and, on November 4, 2009, the Court denied Ascend's request for a preliminary injunction. On January 4, 2011, the Court dismissed Ascend's case with prejudice. On April 5, 2011, the U.S. Patent and Trademark Office cancelled all claims of Ascend's patent. The Court denied the Company's request for reimbursement of legal expenses.

Legal Proceedings

9 Months Ended

Jun. 30, 2011

11. Legal Proceedings

On July 8, 2009, the Company received a complaint filed in the United States District Court in Nevada alleging that the Geospace Seismic Recorder ("GSR"), the Company's newly developed wireless data acquisition system, infringes a patent held by Ascend Geo, LLC ("Ascend"). The Company requested and was granted a change in venue to the United States District Court for the Southern District of Texas in Houston (the "Court"). In addition to monetary damages, Ascend requested a preliminary injunction against future sales by the Company of the GSR nodal system. The Company filed its response with the Court requesting that it deny Ascend's request for a preliminary injunction and, on November 4, 2009, the Court denied Ascend's request for a preliminary injunction. On January 4, 2011, the Court dismissed Ascend's case with prejudice. On April 5, 2011, the U.S. Patent and Trademark Office cancelled all claims of Ascend's patent. The Court denied the Company's request for reimbursement of legal expenses.