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Significant Accounting Policies - Major Customers and Major Suppliers (Details) - Customer Concentration Risk	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Distributor A | Percentage of Total Revenue
Concentration Risk [Line Items]
Concentration risk, percentage	25.00%	25.00%	31.00%
Distributor A | Percentage of Accounts Receivable
Concentration Risk [Line Items]
Concentration risk, percentage	36.00%	23.00%	27.00%
Distributor B | Percentage of Total Revenue
Concentration Risk [Line Items]
Concentration risk, percentage	26.00%	24.00%	27.00%
Distributor B | Percentage of Accounts Receivable
Concentration Risk [Line Items]
Concentration risk, percentage	31.00%	19.00%	25.00%
Distributor C | Percentage of Total Revenue
Concentration Risk [Line Items]
Concentration risk, percentage	32.00%	29.00%	22.00%
Distributor C | Percentage of Accounts Receivable
Concentration Risk [Line Items]
Concentration risk, percentage	10.00%	33.00%	25.00%
Distributor D | Percentage of Total Revenue
Concentration Risk [Line Items]
Concentration risk, percentage	17.00%	22.00%	20.00%
Distributor D | Percentage of Accounts Receivable
Concentration Risk [Line Items]
Concentration risk, percentage	23.00%	25.00%	23.00%

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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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.

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