Commitments and Contingencies	3 Months Ended
Dec. 31, 2018
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingencies	12. Commitments and Contingencies Contingent Earn-out Liabilities The Company established an initial earn-out liability of $7.7 million in connection with its July 2018 acquisition of Quantum. The contingent earn-out payments, if any, which at the Company’s option may be paid in the form of cash or Company stock, will be derived from eligible revenue that may be generated by Quantum during a four-year earn-out period. The maximum amount of contingent payments is $23.5 million over the earn-out period. The fair value of the contingent earn-out liability has not significantly changed since September 30, 2018. For the recent acquisition of the intellectual property and related assets of the OptoSeis fiber optic sensing technology in November 2018, the Company established an initial earn-out liability of $4.3 million. The contingent earn-out payments, if any, will be derived from eligible revenue generated during a five-and-a-half year earn-out period. The maximum amount of contingent payments is $23.2 million over the earn-out period. The Company reviews and accesses the fair value of its contingent earn-out liabilities on a quarterly basis. The fair value of its contingent earn-out liabilities has not changed Legal Proceedings The Company is involved in various pending legal actions in the ordinary course of its business. Management is unable to predict the ultimate outcome of these actions, because of the inherent uncertainty such actions. However, management believes that the most probable, ultimate resolution of these pending matters will not have a material adverse effect on the Company’s consolidated financial position, results of operations or cash flows.

Commitments and Contingencies

3 Months Ended

Dec. 31, 2018

Commitments And Contingencies Disclosure [Abstract]

12. Commitments and Contingencies

Contingent Earn-out Liabilities

The Company established an initial earn-out liability of $7.7 million in connection with its July 2018 acquisition of Quantum. The contingent earn-out payments, if any, which at the Company’s option may be paid in the form of cash or Company stock, will be derived from eligible revenue that may be generated by Quantum during a four-year earn-out period. The maximum amount of contingent payments is $23.5 million over the earn-out period. The fair value of the contingent earn-out liability has not significantly changed since September 30, 2018.

For the recent acquisition of the intellectual property and related assets of the OptoSeis fiber optic sensing technology in November 2018, the Company established an initial earn-out liability of $4.3 million. The contingent earn-out payments, if any, will be derived from eligible revenue generated during a five-and-a-half year earn-out period. The maximum amount of contingent payments is $23.2 million over the earn-out period.

The Company reviews and accesses the fair value of its contingent earn-out liabilities on a quarterly basis. The fair value of its contingent earn-out liabilities has not changed

Legal Proceedings

The Company is involved in various pending legal actions in the ordinary course of its business. Management is unable to predict the ultimate outcome of these actions, because of the inherent uncertainty such actions. However, management believes that the most probable, ultimate resolution of these pending matters will not have a material adverse effect on the Company’s consolidated financial position, results of operations or cash flows.