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Revenue (Tables) | 3 Months Ended
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Dec. 31, 2020
Revenue from Contract with Customer [Abstract] |
Summary of Contract Asset and Liabilities | Contract assets and liabilities as of December 31, 2020 and September 30, 2020 are summarized below (in thousands):
| December 31, 2020 |  | September 30, 2020
Contract assets | $ | 47,886 |  |  | $ | 50,995 |
Contract liabilities | (70,939) |  |  | (79,445) |
Net contract liability | $ | (23,053) |  |  | $ | (28,450) |
Disaggregation of Revenue | The following tables present our disaggregated revenue by geographic destination and market sector for the three months ended December 31, 2020 and 2019 (in thousands):
| Three months ended December 31, |  |
| 2020 |  | 2019 |  |  |  |
United States | $ | 80,586 |  |  | $ | 107,078 |  |  |  |  |
Canada | 14,091 |  |  | 14,454 |  |  |  |  |
Europe, Middle East and Africa | 8,256 |  |  | 10,166 |  |  |  |  |
Asia/Pacific | 2,716 |  |  | 1,686 |  |  |  |  |
Mexico, Central and South America | 926 |  |  | 766 |  |  |  |  |
Total revenues by geographic destination | $ | 106,575 |  |  | $ | 134,150 |  |  |  |  |
| Three months ended December 31, |  |
| 2020 |  | 2019 |  |  |  |
Oil and gas | $ | 40,028 |  |  | $ | 59,994 |  |  |  |  |
Petrochemical | 9,165 |  |  | 30,426 |  |  |  |  |
Electric utility | 28,171 |  |  | 23,015 |  |  |  |  |
Traction power | 13,361 |  |  | 8,351 |  |  |  |  |
All others | 15,850 |  |  | 12,364 |  |  |  |  |
Total revenues by market sector | $ | 106,575 |  |  | $ | 134,150 |  |  |  |  |

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- Definition Tabular disclosure of receivable, contract asset, and contract liability from contract with customer. Includes, but is not limited to, change in contract asset and contract liability. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130551-203045 + Details
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- Definition Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130545-203045 + Details
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