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Intangible Assets
3 Months Ended
Dec. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill And Intangible Assets Disclosure

11. INTANGIBLE ASSETS

Intangible assets consist of the following:

December 31, 2016
Estimated
Useful LivesGross CarryingAccumulated
(in Years)AmountAmortizationNet
Trademarks/trade names5 - 20$3,845$203$3,642
Technical library2040066334
Customer relationships6 - 1527,4142,66124,753
Developed technology440038317
Backlog11,621828793
Construction contracts12,1911,254937
Total$35,871$5,395$30,476

September 30, 2016
Estimated
Useful LivesGross CarryingAccumulated
(in Years)AmountAmortizationNet
Trademarks/trade names5 - 20$3,845$139$3,706
Technical library2040061339
Customer relationships6 - 1527,4142,00325,411
Developed technology440035842
Backlog11,6215451,076
Construction contracts12,1911,0421,149
Total$35,871$4,148$31,723