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Business Segments, Geographic Data, Sales by Product Group and Major Customers - Additional Information (Detail) $ in Thousands | 12 Months Ended
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Dec. 31, 2018 USD ($) segment | Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($)
Segment Reporting Information [Line Items] |  |  |
Number of reporting segments | segment | 3 |  |
Long-lived Assets | $ 20,902 | $ 23,227 |
Provision for doubtful accounts | 9,586 | 11,803 | $ 0
Toys R Us |  |  |
Segment Reporting Information [Line Items] |  |  |
Provision for doubtful accounts | $ 9,600 | $ 11,800 |
Net Accounts Receivable | Wal-Mart and Target | Customer Concentration Risk |  |  |
Segment Reporting Information [Line Items] |  |  |
Concentration risk percentage | 61.40% | 60.60% |
China |  |  |
Segment Reporting Information [Line Items] |  |  |
Long-lived Assets | $ 15,825 | $ 17,194 |
Molds and tools | China |  |  |
Segment Reporting Information [Line Items] |  |  |
Long-lived Assets | $ 15,800 | $ 17,000 |

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