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DETAILS OF SELECTED BALANCE SHEET ACCOUNTS (Tables) | 3 Months Ended
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Mar. 31, 2024
Balance Sheet Related Disclosures [Abstract] |
Schedule of Accounts Receivable | Additional information regarding selected balance sheet accounts at March 31, 2024 and December 31, 2023 is presented below (in thousands):
| March 31, 2024 |  | December 31, 2023
Accounts receivable, net: |  |  |
Trade | $ | 87,111 |  |  | $ | 93,527 |
Unbilled revenue | 41,579 |  |  | 46,331 |
Other | 2,983 |  |  | 3,563 |
Total accounts receivable | 131,673 |  |  | 143,421 |
Allowance for credit losses | (195) |  |  | (199) |
Total accounts receivable, net | $ | 131,478 |  |  | $ | 143,222 |
Schedule of Inventories |
| March 31, 2024 |  | December 31, 2023
Inventories: |  |  |
Finished goods and purchased products | $ | 5,906 |  |  | $ | 5,648 |
Raw materials | 1,327 |  |  | 1,334 |
Total inventories | $ | 7,233 |  |  | $ | 6,982 |
Property, Plant and Equipment |
| Estimated Useful Life (in years) |  | March 31, 2024 |  | December 31, 2023
Property, plant and equipment, net: |  |  |  |  |  |  |  |  |
Land |  |  |  |  |  |  | $ | 25,356 |  |  | $ | 27,988 |
Accommodations assets | 3 |  | — |  | 15 |  | 1,333,543 |  |  | 1,378,408 |
Buildings and leasehold improvements | 7 |  | — |  | 20 |  | 13,983 |  |  | 14,603 |
Machinery and equipment | 4 |  | — |  | 7 |  | 13,643 |  |  | 13,255 |
Office furniture and equipment | 3 |  | — |  | 7 |  | 66,812 |  |  | 67,248 |
Vehicles | 3 |  | — |  | 5 |  | 9,693 |  |  | 10,025 |
Construction in progress |  |  |  |  |  |  | 14,119 |  |  | 12,087 |
Total property, plant and equipment |  |  |  |  |  |  | 1,477,149 |  |  | 1,523,614 |
Accumulated depreciation |  |  |  |  |  |  | (1,231,309) |  |  | (1,253,051) |
Total property, plant and equipment, net |  |  |  |  |  |  | $ | 245,840 |  |  | $ | 270,563 |
Schedule of Accrued Liabilities |
| March 31, 2024 |  | December 31, 2023
Accrued liabilities: |  |  |
Accrued compensation | $ | 20,392 |  |  | $ | 33,854 |
Accrued taxes, other than income taxes | 3,403 |  |  | 3,997 |
Other | 2,332 |  |  | 2,672 |
Total accrued liabilities | $ | 26,127 |  |  | $ | 40,523 |
Schedule of Deferred Revenue |
| March 31, 2024 |  | December 31, 2023
Contract liabilities (Deferred revenue): |  |  |
Current contract liabilities (1) | $ | 4,492 |  |  | $ | 4,849 |
Noncurrent contract liabilities (1) | 7,112 |  |  | 8,068 |
Total contract liabilities (Deferred revenue) | $ | 11,604 |  |  | $ | 12,917 |
(1)Current contract liabilities and Noncurrent contract liabilities are included in "Deferred revenue" and "Other noncurrent liabilities," respectively, in our unaudited consolidated balance sheets.

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