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Business concentrations - Summary Of Customers With Product Revenue For The Periods Indicated Were As Follows (Details)	3 Months Ended
	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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- References

No definition available.

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- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 42
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9054-108599

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 18
-URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6351-108592

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=121572278&loc=d3e13531-108611

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 21
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121572278&loc=d3e13537-108611

Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6404-108592

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