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Consolidated Balance Sheet Detail | 12 Months Ended
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Dec. 31, 2022
Consolidated Balance Sheet Detail | 9. Consolidated Balance Sheet Detail Inventories, net Inventories, net consists of the following:
|  | December 31, |
|  | 2022 |  |  | 2021 |
|  | (Amounts in thousands) |
Raw materials |  | $ | 149,438 |  |  | $ | 123,321 |
Work-in-process |  |  | 6,183 |  |  |  | 8,119 |
Finished products |  |  | 82,656 |  |  |  | 53,054 |
Total inventories, net |  | $ | 238,277 |  |  | $ | 184,494 |
Prepaid Expenses and Other Current Assets Prepaid expenses and other current assets consist of the following:
|  | December 31, |
|  | 2022 |  |  | 2021 |
|  | (Amounts in thousands) |
Equipment maintenance and services |  | $ | 7,135 |  |  | $ | 10,857 |
Prepaid income taxes |  |  | 519 |  |  |  | 3,970 |
Prepaid insurance |  |  | 1,909 |  |  |  | 2,713 |
Other |  |  | 10,274 |  |  |  | 8,409 |
Total prepaid expenses and other current assets |  | $ | 19,837 |  |  | $ | 25,949 |
Property, Plant and Equipment Property, plant and equipment consist of the following:
|  | December 31, |
|  | 2022 |  |  | 2021 |
|  | (Amounts in thousands) |
Land |  | $ | 1,003 |  |  | $ | 1,023 |
Buildings |  |  | 1,599 |  |  |  | 764 |
Leasehold improvements |  |  | 115,672 |  |  |  | 52,505 |
Equipment |  |  | 94,613 |  |  |  | 70,983 |
Furniture, fixtures and office equipment |  |  | 8,307 |  |  |  | 9,137 |
Computer hardware and software |  |  | 29,813 |  |  |  | 22,380 |
Construction in progress |  |  | 31,553 |  |  |  | 38,446 |
Other |  |  | 420 |  |  |  | 443 |
Total property, plant and equipment |  |  | 282,980 |  |  |  | 195,681 |
Less - Accumulated depreciation |  |  | (92,307 | ) |  |  | (70,717 | )
Total property, plant and equipment, net |  | $ | 190,673 |  |  | $ | 124,964 |
Depreciation expense totaled $23.9 million, $16.4 million and $10.9 million in the fiscal years ended December 31, 2022, 2021 and 2020, respectively. Accrued Liabilities Accrued liabilities consist of the following:
|  | December 31, |
|  | 2022 |  |  | 2021 |
|  | (Amounts in thousands) |
Employee compensation |  | $ | 33,522 |  |  | $ | 42,147 |
Deferred revenue |  |  | 19,283 |  |  |  | 14,675 |
Income taxes payable |  |  | 2,459 |  |  |  | 4,984 |
Other |  |  | 15,856 |  |  |  | 13,692 |
Total accrued liabilities |  | $ | 71,120 |  |  | $ | 75,498 |

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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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