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Business Segments, Geographic Data, and Sales by Major Customers - Additional Information (Detail) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2019 USD ($) Segment	Mar. 31, 2018 USD ($)	Dec. 31, 2018
Segment Reporting Information [Line Items]
Number of reporting segments | Segment	3
Provision for doubtful accounts	$ (93)	$ 13,794
Toys ‘R’ Us
Segment Reporting Information [Line Items]
Provision for doubtful accounts		$ 13,800
Net Accounts Receivable | Three Largest Customers | Customer Concentration Risk
Segment Reporting Information [Line Items]
Concentration risk percentage	48.20%		61.40%

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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Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

+ References

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- Definition

Amount of expense related to write-down of receivables to the amount expected to be collected. Includes, but is not limited to, accounts receivable and notes receivable.

+ References

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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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