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Trade Accounts Receivable | 12 Months Ended
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Jan. 31, 2022
Trade Accounts Receivable | Note 5 – Trade Accounts Receivable ​
​ | ​ | ​ | ​ | ​
​ |  | January 31, |  | January 31,
​ | ​ | 2022 | ​ | 2021
Trade accounts receivable |  | 43,565 |  | 39,536
Less: Provision for credit losses |  | (1,860) |  | (2,330)
​ |  | 41,705 |  | 37,206
​ Included in accounts receivable are unbilled receivables in the amount of $0.5 million as at January 31, 2022 ($0.3 million as at January 31, 2021). No single customer accounted for more than 10% of the accounts receivable balance as of January 31, 2022 and 2021. The following table presents the changes in the provision for credit losses as follows: ​
​ | ​ | ​
​ |  | Provision
​ | ​ | for Credit
​ | ​ | Losses
Balance at January 31, 2020 |  | 2,003
Current period provision for expected losses |  | 1,681
Write-offs charged against the provision |  | (1,418)
Effect of movements in foreign exchange |  | 64
Balance at January 31, 2021 |  | 2,330
Current period provision for expected losses |  | 1,007
Write-offs charged against the provision |  | (1,456)
Effect of movements in foreign exchange |  | (21)
Balance at January 31, 2022 |  | 1,860
​

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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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