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DETAILS OF SELECTED BALANCE SHEET ACCOUNTS | 9 Months Ended
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Sep. 30, 2022
Balance Sheet Related Disclosures [Abstract] |
DETAILS OF SELECTED BALANCE SHEET ACCOUNTS | DETAILS OF SELECTED BALANCE SHEET ACCOUNTS Additional information regarding selected balance sheet accounts at September 30, 2022 and December 31, 2021 is presented below (in thousands):
| September 30, 2022 |  | December 31, 2021
Accounts receivable, net: |  |  |
Trade | $ | 69,833 |  |  | $ | 75,740 |
Unbilled revenue | 51,567 |  |  | 38,508 |
Other | 1,184 |  |  | 972 |
Total accounts receivable | 122,584 |  |  | 115,220 |
Allowance for credit losses | (304) |  |  | (361) |
Total accounts receivable, net | $ | 122,280 |  |  | $ | 114,859 |
| September 30, 2022 |  | December 31, 2021
Inventories: |  |  |
Finished goods and purchased products | $ | 5,586 |  |  | $ | 5,346 |
Work in process | — |  |  | 25 |
Raw materials | 1,398 |  |  | 1,097 |
Total inventories | $ | 6,984 |  |  | $ | 6,468 |
| Estimated Useful Life (in years) |  | September 30, 2022 |  | December 31, 2021
Property, plant and equipment, net: |  |  |  |  |  |  |  |  |
Land |  |  |  |  |  |  | $ | 25,896 |  |  | $ | 30,556 |
Accommodations assets | 3 |  | — |  | 15 |  | 1,426,704 |  |  | 1,657,577 |
Buildings and leasehold improvements | 7 |  | — |  | 20 |  | 17,260 |  |  | 24,335 |
Machinery and equipment | 4 |  | — |  | 15 |  | 10,752 |  |  | 14,983 |
Office furniture and equipment | 3 |  | — |  | 7 |  | 61,187 |  |  | 63,228 |
Vehicles | 3 |  | — |  | 5 |  | 8,227 |  |  | 14,578 |
Construction in progress |  |  |  |  |  |  | 9,444 |  |  | 2,063 |
Total property, plant and equipment |  |  |  |  |  |  | 1,559,470 |  |  | 1,807,320 |
Accumulated depreciation |  |  |  |  |  |  | (1,249,718) |  |  | (1,417,324) |
Total property, plant and equipment, net |  |  |  |  |  |  | $ | 309,752 |  |  | $ | 389,996 |
| September 30, 2022 |  | December 31, 2021
Accrued liabilities: |  |  |
Accrued compensation | $ | 27,577 |  |  | $ | 28,877 |
Accrued taxes, other than income taxes | 2,901 |  |  | 2,944 |
Other | 1,954 |  |  | 1,743 |
Total accrued liabilities | $ | 32,432 |  |  | $ | 33,564 |
| September 30, 2022 |  | December 31, 2021
Deferred revenue: |  |  |
Contract liabilities | $ | 2,092 |  |  | $ | 18,479 |
Deferred revenue consists of contract liabilities resulting from upfront payments related to the mobilization of mobile assets to service pipeline projects in our Canadian business segment. The decrease in deferred revenue from December 31, 2021 to September 30, 2022 was primarily due to the recognition of deferred revenue over the contracted terms of these pipeline projects in Canada.

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- Definition The entire disclosure for supplemental balance sheet disclosures, including descriptions and amounts for assets, liabilities, and equity. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -URI https://asc.fasb.org/topic&trid=2122208 + Details
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