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Revenue by Product Category (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
NET SALES	$ 922,100	$ 539,521	$ 457,253
Mobile Storage
Segment Reporting Information [Line Items]
NET SALES	910,569	532,682	441,700
Mobile Communications
Segment Reporting Information [Line Items]
NET SALES	0	0	10,356
Others
Segment Reporting Information [Line Items]
NET SALES	$ 11,531	$ 6,839	$ 5,197

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Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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