Significant Concentrations - Additional Information (Detail) - USD ($) $ in Millions		12 Months Ended
	Mar. 01, 2019	Dec. 31, 2019	Dec. 31, 2018
Concentration Risk [Line Items]
Distribution partners in Europe, Turkey and Africa existing distribution agreements expiration date		Jun. 30, 2019
ODAs windows mobile operating system expiration date	Apr. 30, 2022
Rebate credits outstanding		$ 1.0
Cost of revenue [Member]
Concentration Risk [Line Items]
Allocation of rebate values, percentage		20.00%	30.00%
Reduction in marketing expense [Member]
Concentration Risk [Line Items]
Allocation of rebate values, percentage		80.00%	70.00%
Revenue [Member] | Supplier Concentration Risk [Member] | Windows Operating Systems [Member]
Concentration Risk [Line Items]
Concentration risk, percentage		79.00%	75.00%
Third Party Software [Member]
Concentration Risk [Line Items]
Percentage of sales from existing distribution agreements on total revenues		3.00%