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Major Reseller Customers - Schedule of Revenue by Major Customers by Reporting Segments (Detail) - Customer Concentration Risk [Member] - Revenue Benchmark [Member] - Reseller [Member]	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Customer A [Member]
Revenue, Major Customer [Line Items]
Concentration Risk, Percentage	21.50%	20.00%	12.80%
Customer B [Member]
Revenue, Major Customer [Line Items]
Concentration Risk, Percentage	5.40%	5.70%	5.60%
Customer C [Member]
Revenue, Major Customer [Line Items]
Concentration Risk, Percentage	4.50%	5.60%	2.50%

X

- 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

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-Publisher FASB
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- Definition

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+ References

No definition available.

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