Goodwill	12 Months Ended
Sep. 30, 2016
Goodwill And Intangible Assets Disclosure [Abstract]
Goodwill	10. Goodwill At September 30, 2015, the Company conducted a qualitative goodwill impairment assessment on its seismic reporting unit as business conditions in the oil and gas industry further deteriorated in the Company’s fiscal year 2015 fourth quarter resulting in a decline in the market value of the Company’s common stock significantly below its book value. The qualitative assessment determined that performing a quantitative goodwill impairment test was necessary. In the first step of the goodwill impairment test, the Company determined that the fair value of its seismic reporting unit was less than its carrying amount, including goodwill. Therefore, the Company performed the second step of the goodwill impairment test which concluded that there would be no remaining implied value attributable to goodwill. In order to arrive at the implied fair value of goodwill, the Company calculated the fair value of its all of its assets and liabilities of the seismic reporting unit as if it had been acquired in a business combination. The estimate of the fair value of the Company’s seismic reporting unit was based on the best information available as of the date of the assessment. As a result, the Company recorded a goodwill impairment charge of $1.8 million to reduce the carrying value of the goodwill to zero at September 30, 2015. The impairment charge is included in operating expenses on the Company’s consolidated statement of operations for the year ended September 30, 2015.

10. Goodwill

At September 30, 2015, the Company conducted a qualitative goodwill impairment assessment on its seismic reporting unit as business conditions in the oil and gas industry further deteriorated in the Company’s fiscal year 2015 fourth quarter resulting in a decline in the market value of the Company’s common stock significantly below its book value.

The qualitative assessment determined that performing a quantitative goodwill impairment test was necessary. In the first step of the goodwill impairment test, the Company determined that the fair value of its seismic reporting unit was less than its carrying amount, including goodwill. Therefore, the Company performed the second step of the goodwill impairment test which concluded that there would be no remaining implied value attributable to goodwill. In order to arrive at the implied fair value of goodwill, the Company calculated the fair value of its all of its assets and liabilities of the seismic reporting unit as if it had been acquired in a business combination. The estimate of the fair value of the Company’s seismic reporting unit was based on the best information available as of the date of the assessment.

As a result, the Company recorded a goodwill impairment charge of $1.8 million to reduce the carrying value of the goodwill to zero at September 30, 2015. The impairment charge is included in operating expenses on the Company’s consolidated statement of operations for the year ended September 30, 2015.