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Accrued Expenses | 3 Months Ended
--- | ---
Mar. 31, 2022
Accrued Expenses |
Accrued Expenses |
9. | Accrued Expenses
Accrued expenses consisted of the following (in thousands):
|  | March 31, |  |  | December 31, |
|  | 2022 |  |  | 2021 |
Accrued wages and benefits |  | $ | 672 |  |  | $ | 1,188 |
Accrued accounts payable |  |  | 686 |  |  |  | 609 |
Accrued sales and telecommunications taxes |  |  | 2,216 |  |  |  | 2,487 |
Product warranty liability |  |  | 51 |  |  |  | 50 |
Other |  |  | 615 |  |  |  | 570 |
Total accrued expenses |  | $ | 4,240 |  |  | $ | 4,904 |
The changes in aggregate product warranty liabilities for the year ended December 31, 2021 and the three months ended March 31, 2022 were as follows (in thousands): Product warranty expense is included in cost of product revenue expense and totaled $11,000 and $5,000 for the three months ended March 31, 2022 and 2021, respectively.
|  | Warranty Liabilities |
Balance at January 1, 2021 |  | $ | 33 |
Accrual for warranties |  |  | 50 |
Adjustments related to pre-existing warranties |  |  | 1 |
Warranty settlements |  |  | (34 | )
Balance at December 31, 2021 |  |  | 50 |
Accrual for warranties |  |  | 11 |
Warranty settlements |  |  | (10 | )
Balance at March 31, 2022 |  | $ | 51 |

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