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Receivables | 12 Months Ended
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Dec. 31, 2021
Receivables [Abstract] |
Receivables | Note 6. RECEIVABLES Changes in the allowance for doubtful accounts consisted of the following (in thousands):
|  | Year Ended December 31, |
|  | 2021 |  |  | 2020 |  |  | 2019 |
Balance at beginning of year |  | $ | 429 |  |  | $ | 557 |  |  | $ | 607 |
Increase in allowance charged to expense |  |  | 253 |  |  |  | 1,210 |  |  |  | 362 |
Accounts charged against the allowance, net of recoveries |  |  | (224 | ) |  |  | (1,338 | ) |  |  | (412 | )
Balance at end of year |  | $ | 458 |  |  | $ | 429 |  |  | $ | 557 |
Notes receivable from lessee dealers totaled $0.5 million and $1.3 million at December 31, 2021 and 2020, respectively, and are included in other current assets and other noncurrent assets on the consolidated balance sheets.

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- Definition The entire disclosure for claims held for amounts due a entity, excluding financing receivables. Examples include, but are not limited to, trade accounts receivables, notes receivables, loans receivables. Includes disclosure for allowance for credit losses. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -URI http://asc.fasb.org/subtopic&trid=2196772 + Details
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