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COMPOSITION OF CERTAIN BALANCE SHEET ACCOUNTS | 12 Months Ended
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Dec. 31, 2023
COMPOSITION OF CERTAIN BALANCE SHEET ACCOUNTS |
COMPOSITION OF CERTAIN BALANCE SHEET ACCOUNTS | ​ ​ 10.COMPOSITION OF CERTAIN BALANCE SHEET ACCOUNTS Accrued Expenses and Other Current Liabilities ​ Accrued expenses and other current liabilities consisted of the following (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | December 31,
​ |  | 2023 |  | 2022
Accrued sales rebates | ​ | $ | 10,170 | ​ | $ | 16,705
Accrued product warranties | ​ |  | 2,889 | ​ |  | 3,763
Accrued incentives | ​ |  | 1,270 | ​ |  | 2,727
Accrued vacation | ​ |  | 2,310 | ​ |  | 2,422
Accrued payroll | ​ |  | 4,893 | ​ |  | 5,750
Accrued interest | ​ | ​ | 2,955 | ​ | ​ | 2,868
Income taxes payable | ​ | ​ | 1,682 | ​ | ​ | 923
Deferred revenue | ​ | ​ | 3,787 | ​ | ​ | 4,480
Other accrued expenses | ​ |  | 10,735 | ​ |  | 11,247
Total accrued expenses and other current liabilities | ​ | $ | 40,691 | ​ | $ | 50,885
​ Allowance for Bad Debt ​ The allowance for bad debt consisted of the following (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year Ended
​ | ​ | December 31,
​ |  | 2023 |  | 2022 |  | 2021
Balance at the beginning of the year | ​ | $ | 3,161 | ​ | $ | 2,393 | ​ | $ | 1,438
Bad debt expense | ​ |  | 5,379 | ​ |  | 2,011 | ​ |  | 979
Write-offs, net of recoveries | ​ |  | (996) | ​ |  | (1,243) | ​ |  | (24)
Balance at the end of the year | ​ | $ | 7,544 | ​ | $ | 3,161 | ​ | $ | 2,393
​

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- Definition The entire disclosure for accounts payable and accrued liabilities at the end of the reporting period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(a),20,24) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 + Details
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