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Notes Receivable (Tables) | 12 Months Ended
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Dec. 29, 2019
Notes Receivable |
Summary of Changes in Notes Receivable Allowance for Doubtful Accounts | The following summarizes changes in our notes receivable allowance for doubtful accounts (in thousands): ​
​ | ​ | ​ | ​ | ​
Balance as of December 31, 2017 |  | $ | 1,047 |
Recovered from costs and expenses | ​ |  | (393) | ​
Additions, net of notes written off | ​ |  | 2,715 | ​
Balance as of December 30, 2018 | ​ |  | 3,369 | ​
Recovered from costs and expenses | ​ |  | (77) | ​
Additions, net of notes written off | ​ |  | 280 | ​
Balance as of December 29, 2019 | ​ | $ | 3,572 | ​
​ | ​ | ​ | ​ | ​

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