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Business concentrations - Summary Of Customers With Product Revenue For The Periods Indicated Were As Follows (Details) | 3 Months Ended
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Mar. 31, 2021 | Mar. 31, 2020
Customer A [Member] |  |
Disclosure Of Customers With Product Revenue and Account Receivable For The Period [Line Items] |  |
Concentration Risk, Percentage | 13.00% | 26.00%
Customer A [Member] | Accounts Receivable [Member] |  |
Disclosure Of Customers With Product Revenue and Account Receivable For The Period [Line Items] |  |
Concentration Risk, Percentage | 14.00% | 17.00%
Customer B [Member] |  |
Disclosure Of Customers With Product Revenue and Account Receivable For The Period [Line Items] |  |
Concentration Risk, Percentage | 18.00% | 18.00%
Customer B [Member] | Accounts Receivable [Member] |  |
Disclosure Of Customers With Product Revenue and Account Receivable For The Period [Line Items] |  |
Concentration Risk, Percentage | 20.00% | 19.00%
Customer C [Member] |  |
Disclosure Of Customers With Product Revenue and Account Receivable For The Period [Line Items] |  |
Concentration Risk, Percentage | 22.00% | 15.00%
Customer C [Member] | Accounts Receivable [Member] |  |
Disclosure Of Customers With Product Revenue and Account Receivable For The Period [Line Items] |  |
Concentration Risk, Percentage | 33.00% | 25.00%
Customer D [Member] |  |
Disclosure Of Customers With Product Revenue and Account Receivable For The Period [Line Items] |  |
Concentration Risk, Percentage |  | 10.00%
Customer D [Member] | Accounts Receivable [Member] |  |
Disclosure Of Customers With Product Revenue and Account Receivable For The Period [Line Items] |  |
Concentration Risk, Percentage |  | 11.00%

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