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v3.23.3

Balance Sheet Details (Tables) | 9 Months Ended
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Sep. 30, 2023
Balance Sheet Details |
Schedule of short-term investments | Short-term investments consisted of the following (in thousands):
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | At September 30, 2023 |
​ | ​ | Maturity | ​ | Amortized cost | ​ | Unrealized | ​ | Unrealized | ​ | Estimated |
​ |  | (in years) |  | or cost |  | gains |  | losses |  | fair value |
U.S. government agency bonds | ​ | less than 3 | ​ | $ | 47,989 | ​ | $ | - | ​ | ​ | (658) | ​ | $ | 47,331 | ​
U.S. treasury securities | ​ | less than 2 | ​ | ​ | 95,929 | ​ | ​ | - | ​ | ​ | (320) | ​ | ​ | 95,609 | ​
Bank certificates of deposit | ​ | less than 2 | ​ | ​ | 11,300 | ​ | ​ | 1 | ​ | ​ | (1) | ​ | ​ | 11,300 | ​
Corporate notes | ​ | less than 3 | ​ |  | 22,104 | ​ |  | 11 | ​ |  | (403) | ​ |  | 21,712 | ​
Asset-backed securities | ​ | less than 2 | ​ |  | 8,613 | ​ |  | - | ​ |  | (226) | ​ |  | 8,387 | ​
Municipal bonds | ​ | less than 3 | ​ | ​ | 7,634 | ​ | ​ | - | ​ | ​ | (45) | ​ | ​ | 7,589 | ​
Total | ​ | ​ | ​ | $ | 193,569 | ​ | $ | 12 | ​ | $ | (1,653) | ​ | $ | 191,928 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | At December 31, 2022 |
​ | ​ | Maturity | ​ | Amortized cost | ​ | Unrealized | ​ | Unrealized | ​ | Estimated |
​ |  | (in years) |  | or cost |  | gains |  | losses |  | fair value |
U.S. government agency bonds | ​ | less than 3 | ​ | $ | 88,478 | ​ | $ | - | ​ | $ | (2,413) | ​ | $ | 86,065 | ​
U.S. treasury securities | ​ | less than 1 | ​ | ​ | 52,991 | ​ | ​ | - | ​ | ​ | (384) | ​ | ​ | 52,607 | ​
Bank certificates of deposit | ​ | less than 1 | ​ | ​ | 17,500 | ​ | ​ | 3 | ​ | ​ | (11) | ​ | ​ | 17,492 | ​
Corporate notes | ​ | less than 3 | ​ |  | 41,464 | ​ |  | - | ​ |  | (978) | ​ |  | 40,486 | ​
Asset-backed securities | ​ | less than 2 | ​ |  | 21,656 | ​ |  | - | ​ |  | (360) | ​ |  | 21,296 | ​
Municipal bonds | ​ | less than 3 | ​ | ​ | 15,635 | ​ | ​ | - | ​ | ​ | (411) | ​ | ​ | 15,224 | ​
Total | ​ | ​ | ​ | $ | 237,724 | ​ | $ | 3 | ​ | $ | (4,557) | ​ | $ | 233,170 | ​
Schedule of accounts receivable, net | Accounts receivable consisted of the following (in thousands):
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | September 30, | ​ | December 31, | ​
​ |  | 2023 |  | 2022 |
Accounts receivable | ​ | $ | 40,510 | ​ | $ | 37,323 | ​
Allowance for credit losses | ​ | ​ | (1,184) | ​ | ​ | (1,250) | ​
​ | ​ | $ | 39,326 | ​ | $ | 36,073 | ​
Schedule of inventory | Inventory consisted of the following (in thousands):
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | September 30, | ​ | December 31, | ​
​ |  | 2023 |  | 2022 |
Finished goods | ​ | $ | 16,674 | ​ | $ | 13,742 | ​
Work in process | ​ | ​ | 11,470 | ​ | ​ | 10,495 | ​
Raw material | ​ | ​ | 11,637 | ​ | ​ | 13,604 | ​
​ | ​ | $ | 39,781 | ​ | $ | 37,841 | ​
Schedule of accrued liabilities | Accrued liabilities consisted of the following (in thousands):
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | September 30, | ​ | December 31,
​ |  | 2023 |  | 2022
Accrued bonuses | ​ | $ | 13,661 | ​ | $ | 17,219
Accrued vacation benefits | ​ | ​ | 5,032 | ​ | ​ | 4,475
Other accrued liabilities | ​ | ​ | 38,041 | ​ | ​ | 36,262
​ | ​ | $ | 56,734 | ​ | $ | 57,956
​

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