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Balance Sheet Details (Tables) | 12 Months Ended
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Dec. 31, 2022
Balance Sheet Related Disclosures [Abstract] |
Accounts Receivable, net | Accounts receivable, net consisted of the following (in thousands):
|  | December 31,
|  | 2022 |  | 2021
Accounts receivable |  | $ | 94,201 |  |  | $ | 85,944 |
Allowance for doubtful accounts |  | (397) |  |  | (725) |
|  | $ | 93,804 |  |  | $ | 85,219 |
Changes in Allowance for Doubtful Accounts and Product Reserve | The table below summarizes the changes in allowance for doubtful accounts and product return liability for the periods indicated (in thousands):
|  | Balance at Beginning of Year |  | Additions Charged to Expenses or Revenue Net of Recoveries |  | Write Offs and Returns |  | Balance at End of Year
Year Ended December 31, 2022: |  |  |  |  |  |  |  |
Allowance for doubtful accounts |  | $ | 725 |  |  | $ | (276) |  |  | $ | (52) |  |  | $ | 397 |
Product return liability |  | 1,836 |  |  | 5,622 |  |  | (4,497) |  |  | 2,961 |
Year Ended December 31, 2021: |  |  |  |  |  |  |  |
Allowance for doubtful accounts |  | $ | 1,405 |  |  | $ | (201) |  |  | $ | (479) |  |  | $ | 725 |
Product return liability |  | 1,888 |  |  | 3,681 |  |  | (3,733) |  |  | 1,836 |
Year Ended December 31, 2020: |  |  |  |  |  |  |  |
Allowance for doubtful accounts |  | $ | 374 |  |  | $ | 1,085 |  |  | $ | (54) |  |  | $ | 1,405 |
Product return liability |  | 919 |  |  | 3,391 |  |  | (2,422) |  |  | 1,888 |
Inventory | Inventory consisted of the following (in thousands):
|  | December 31,
|  | 2022 |  | 2021
Raw materials |  | $ | 640 |  |  | $ | 130 |
Finished goods |  | 148,520 |  |  | 88,750 |
|  | $ | 149,160 |  |  | $ | 88,880 |
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure | Prepaid expenses and other current assets consisted of the following (in thousands):
|  | December 31,
|  | 2022 |  | 2021
Supplier deposits |  | $ | 39,064 |  |  | $ | 6,191 |
Prepaid expenses and other current assets |  | 23,627 |  |  | 24,620 |
|  | $ | 62,691 |  |  | $ | 30,811 |
Property and Equipment, net | Property and equipment, net consisted of the following (in thousands):
|  | December 31,
|  | 2022 |  | 2021
Test equipment |  | $ | 44,106 |  |  | $ | 39,476 |
Computer equipment |  | 13,396 |  |  | 11,156 |
Software |  | 10,389 |  |  | 9,013 |
Leasehold improvements |  | 1,730 |  |  | 1,351 |
Furniture and fixtures |  | 1,153 |  |  | 1,812 |
|  | 70,774 |  |  | 62,808 |
Accumulated depreciation and amortization |  | (44,940) |  |  | (41,025) |
|  | $ | 25,834 |  |  | $ | 21,783 |
Schedule of Other Assets, Noncurrent | Other long-term assets consisted of the following (in thousands):
|  | December 31,
|  | 2022 |  | 2021
Intangible asset |  | $ | 4,253 |  |  | $ | 6,885 |
Other long-term assets |  | 14,889 |  |  | 6,800 |
|  | $ | 19,142 |  |  | $ | 13,685 |
Accrued Liabilities | Accrued liabilities consisted of the following (in thousands):
|  | December 31,
|  | 2022 |  | 2021
Compensation and related benefits |  | $ | 27,813 |  |  | $ | 23,165 |
Component inventory held by suppliers |  | 10,280 |  |  | 7,611 |
Professional and consulting fees |  | 7,307 |  |  | 4,819 |
Current portion of revenue-share payments |  | 7,210 |  |  | 4,731 |
Current portion of warranty and retrofit |  | 6,377 |  |  | 7,076 |
Customer advances or rebates |  | 5,653 |  |  | 4,742 |
Taxes payable |  | 4,581 |  |  | 4,251 |
Operating leases |  | 3,949 |  |  | 3,596 |
Freight |  | 3,649 |  |  | 3,997 |
Business events |  | 3,167 |  |  | — |
Product returns |  | 2,961 |  |  | 1,836 |
Other |  | 7,527 |  |  | 5,773 |
|  | $ | 90,474 |  |  | $ | 71,597 |
Schedule of Product Warranty Liability | Changes in the Company’s accrued warranty and retrofit liability were as follows (in thousands):
|  | Years Ended December 31,
|  | 2022 |  | 2021 |  | 2020
Balance at beginning of year |  | $ | 9,594 |  |  | $ | 9,208 |  |  | $ | 7,294 |
Provision for warranty and retrofit charged to cost of revenue |  | 1,315 |  |  | 3,370 |  |  | 5,888 |
Utilization of reserve |  | (2,523) |  |  | (2,984) |  |  | (3,974) |
Balance at end of year |  | $ | 8,386 |  |  | $ | 9,594 |  |  | $ | 9,208 |

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