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Consolidated Balance Sheet Detail (Tables) | 12 Months Ended
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Dec. 31, 2020
Inventories | Inventories, net consists of the following:
|  | December 31, |
|  | 2020 |  |  | 2019 |
|  | (Amounts in thousands) |
Raw materials |  | $ | 48,746 |  |  | $ | 29,328 |
Work-in-process |  |  | 8,084 |  |  |  | 8,360 |
Finished products |  |  | 38,195 |  |  |  | 17,144 |
Total inventories, net |  | $ | 95,025 |  |  | $ | 54,832 |
Prepaid Expenses and Other Current Assets | Prepaid expenses and other current assets consist of the following:
|  | December 31, |
|  | 2020 |  |  | 2019 |
|  | (Amounts in thousands) |
Equipment maintenance and services |  | $ | 4,601 |  |  | $ | 1,662 |
Prepaid income taxes |  |  | 2,649 |  |  |  | 2,719 |
Prepaid insurance |  |  | 1,936 |  |  |  | 80 |
Other |  |  | 9,490 |  |  |  | 1,456 |
Total prepaid expenses and other current assets |  | $ | 18,676 |  |  | $ | 5,917 |
Property, Plant and Equipment | Property, plant and equipment consist of the following:
|  | December 31, |
|  | 2020 |  |  | 2019 |
|  | (Amounts in thousands) |
Land |  | $ | 1,023 |  |  | $ | 1,023 |
Buildings |  |  | 1,007 |  |  |  | 764 |
Leasehold improvements |  |  | 31,331 |  |  |  | 23,905 |
Equipment |  |  | 43,072 |  |  |  | 36,257 |
Furniture, fixtures and office equipment |  |  | 8,714 |  |  |  | 6,312 |
Computer hardware and software |  |  | 15,397 |  |  |  | 8,810 |
Construction in progress |  |  | 14,927 |  |  |  | 6,707 |
Other |  |  | 455 |  |  |  | 56 |
Total property, plant and equipment |  |  | 115,926 |  |  |  | 83,834 |
Less - Accumulated depreciation |  |  | (49,056 | ) |  |  | (35,379 | )
Total property, plant and equipment, net |  | $ | 66,870 |  |  | $ | 48,455 |
Accrued Liabilities | Accrued liabilities consist of the following:
|  | December 31, |
|  | 2020 |  |  | 2019 |
|  | (Amounts in thousands) |
Employee compensation |  | $ | 20,288 |  |  | $ | 19,850 |
Income taxes payable |  |  | 1,423 |  |  |  | 3,874 |
Royalty and license fees |  |  | 466 |  |  |  | 123 |
Warranties |  |  | 1,576 |  |  |  | 1,500 |
Professional fees |  |  | 1,425 |  |  |  | 1,081 |
Deferred revenue |  |  | 15,318 |  |  |  | 5,005 |
Other |  |  | 12,589 |  |  |  | 1,898 |
Total accrued liabilities |  | $ | 53,085 |  |  | $ | 33,331 |

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