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COMPOSITION OF CERTAIN BALANCE SHEET ACCOUNTS (Tables) | 12 Months Ended
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Dec. 31, 2023
COMPOSITION OF CERTAIN BALANCE SHEET ACCOUNTS |
Schedule of 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
Schedule for allowance of bad debt activity | 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 Tabular disclosure of allowance for credit loss on accounts receivable. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-13 + Details
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- Definition Tabular disclosure of the (a) carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business (accounts payable); (b) other payables; and (c) accrued liabilities. Examples include taxes, interest, rent and utilities. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). An alternative caption includes accrued expenses. + References No definition available. + Details
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