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v3.19.1

Summary of Significant Accounting Policies and Related Information - Receivables (Details) - Customer | 12 Months Ended
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Feb. 28, 2019 | Feb. 28, 2018 | Feb. 28, 2017
Receivables |  |  |
Number of major customers | 5 | 5 |
Customer concentration risk |  |  |
Receivables |  |  |
Number of major customers | 3 |  |
Gross trade receivable | Customer concentration risk | Customer One |  |  |
Receivables |  |  |
Concentration risk percentage | 17.00% |  |
Gross trade receivable | Customer concentration risk | Customer Two |  |  |
Receivables |  |  |
Concentration risk percentage | 12.00% |  |
Gross trade receivable | Customer concentration risk | Customer Three |  |  |
Receivables |  |  |
Concentration risk percentage | 12.00% |  |
Gross trade receivable | Customer concentration risk | Five top customers |  |  |
Receivables |  |  |
Concentration risk percentage | 48.00% |  |
Top Supplier | Cost of goods sold manufactured by vendors | Supplier concentration risk |  |  |
Receivables |  |  |
Concentration risk percentage | 11.00% |  |
Top five suppliers | Cost of goods sold manufactured by vendors | Supplier concentration risk |  |  |
Receivables |  |  |
Concentration risk percentage | 38.00% | 34.00% | 31.00%
Minimum |  |  |
Receivables |  |  |
Term allowed for sales returns | 2 years |  |
Maximum |  |  |
Receivables |  |  |
Term allowed for sales returns | 5 years |  |

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