| Balance Sheet Components | 
Balance Sheet Components Accounts Receivable, Net 
Accounts receivable, net consisted of the following: 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 
 | 
September 30, | 
 | 
December 31, | 
 
 | 
2022 | 
 | 
2021 | 
 
 | 
(In thousands) | 
 
| Trade Receivables | 
$ | 
20,989  | 
 | 
 | 
$ | 
12,845  | 
 | 
 
| Less: Allowances for Doubtful Accounts | 
(67) | 
 | 
 | 
(67) | 
 | 
 
| Total | 
$ | 
20,922  | 
 | 
 | 
$ | 
12,778  | 
 | 
 
  
Inventories 
Inventories consisted of the following: 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 
 | 
September 30, | 
 | 
December 31, | 
 
 | 
2022 | 
 | 
2021 | 
 
 | 
(In thousands) | 
 
| Raw materials | 
$ | 
51,751  | 
 | 
 | 
$ | 
16,594  | 
 | 
 
| Work-in-progress | 
17,562  | 
 | 
 | 
5,885  | 
 | 
 
| Total | 
$ | 
69,313  | 
 | 
 | 
$ | 
22,479  | 
 | 
 
  
Prepaid Expenses and Other Current Assets 
Prepaid expenses and other current assets consisted of the following: 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 
 | 
September 30, | 
 | 
December 31, | 
 
 | 
2022 | 
 | 
2021 | 
 
 | 
(In thousands) | 
 
| Prepaid insurance and other | 
$ | 
1,920  | 
 | 
 | 
$ | 
5,326  | 
 | 
 
| Vendor prepayments | 
2,703  | 
 | 
 | 
4,132  | 
 | 
 
| Total | 
$ | 
4,623  | 
 | 
 | 
$ | 
9,458  | 
 | 
 
  
Property and Equipment, Net 
Property and equipment, net consisted of the following: 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 
 | 
September 30, | 
 | 
December 31, | 
 
 | 
2022 | 
 | 
2021 | 
 
 | 
(In thousands) | 
 
| Computers and software | 
$ | 
2,084  | 
 | 
 | 
$ | 
1,397  | 
 | 
 
| Lab equipment and other equipment | 
6,467  | 
 | 
 | 
2,283  | 
 | 
 
| Furniture and fixtures | 
181  | 
 | 
 | 
88  | 
 | 
 
| Leasehold improvements | 
15,131  | 
 | 
 | 
2,771  | 
 | 
 
| Construction in progress | 
171  | 
 | 
 | 
6,273  | 
 | 
 
| Total property, plant and equipment | 
24,034  | 
 | 
 | 
12,812  | 
 | 
 
| Less accumulated depreciation and amortization | 
(4,826) | 
 | 
 | 
(2,766) | 
 | 
 
| Property, plant and equipment, net | 
$ | 
19,208  | 
 | 
 | 
$ | 
10,046  | 
 | 
 
  
Depreciation expense for the three months ended September 30, 2022 and 2021 was $0.9 million and $0.4 million, respectively. Depreciation expense for the nine months ended September 30, 2022 and 2021 was $2.1 million and $0.8 million, respectively. 
Accrued Expenses and Other Current Liabilities 
Accrued expenses and other current liabilities consisted of the following: 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 
 | 
September 30, | 
 | 
December 31, | 
 
 | 
2022 | 
 | 
2021 | 
 
 | 
(In thousands) | 
 
| Accrued expenses | 
$ | 
10,711  | 
 | 
 | 
$ | 
3,015  | 
 | 
 
| Accrued salaries and benefits | 
6,333  | 
 | 
 | 
4,143  | 
 | 
 
| Lease liability – current portion | 
2,638  | 
 | 
 | 
2,256  | 
 | 
 
| Total Accrued expenses and other current liabilities | 
$ | 
19,682  | 
 | 
 | 
$ | 
9,414  | 
 | 
 
  
       Other noncurrent liabilities consisted of the following: 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 
 | 
September 30, | 
 | 
December 31, | 
 
 | 
2022 | 
 | 
2021 | 
 
 | 
(In thousands) | 
 
| Lease liabilities - noncurrent portion | 
$ | 
13,214  | 
 | 
 | 
$ | 
9,184  | 
 | 
 
| Other noncurrent liabilities | 
1,013  | 
 | 
 | 
308  | 
 | 
 
| Total other noncurrent liabilities | 
$ | 
14,227  | 
 | 
 | 
$ | 
9,492  | 
 | 
 
  
Please refer to Note 12, Equity Instruments, for further details of the contingent earnout liability and warrant liabilities.
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