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DETAILS OF SELECTED BALANCE SHEET ACCOUNTS (Tables) | 9 Months Ended
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Sep. 30, 2022
Balance Sheet Related Disclosures [Abstract] |
Schedule of Accounts Receivable | 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 |
Schedule of Inventories |
| 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 |
Property, Plant and Equipment |
| 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 |
Schedule of Accrued Liabilities |
| 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 |
Schedule of Deferred Revenue |
| September 30, 2022 |  | December 31, 2021
Deferred revenue: |  |  |
Contract liabilities | $ | 2,092 |  |  | $ | 18,479 |

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- Definition Tabular disclosure of physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, balances by class of assets, depreciation and depletion expense and method used, including composite depreciation, and accumulated deprecation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 + Details
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