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Summary of significant accounting policies	9 Months Ended
Summary of significant accounting policies	Jun. 30, 2012
Summary of significant accounting policies [Abstract]
Summary of significant accounting policies	(2) Summary of significant accounting policies Other than the new accounting pronouncement as set forth in Note 3 below, there have been no changes since the end of 2011 to the significant accounting policies followed by Sevcon, Inc.

The entire disclosure for all significant accounting policies of the reporting entity.