Rental Equipment (Tables)

12 Months Ended

Sep. 30, 2012

Rental Equipment [Abstract]

Rental equipment

	AS OF SEPTEMBER 30,
	2012			2011
Rental equipment, primarily geophones and related products	$	39,766		$	21,250
Accumulated depreciation		(11,913	)		(9,305	)
	$	27,853		$	11,945