Business Segments, Geographic Data, and Sales by Major Customers - Net Sales to Major Customers (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Revenue, Major Customer [Line Items]
Net sales	$ 66,557	$ 70,826
Net Sales | Customer Concentration Risk
Revenue, Major Customer [Line Items]
Net sales	$ 33,125	$ 34,288
Percentage of Net Sales	49.80%	48.40%
Net Sales | Customer Concentration Risk | Wal-Mart
Revenue, Major Customer [Line Items]
Net sales	$ 18,510	$ 22,109
Percentage of Net Sales	27.80%	31.20%
Net Sales | Customer Concentration Risk | Target
Revenue, Major Customer [Line Items]
Net sales	$ 14,615	$ 12,179
Percentage of Net Sales	22.00%	17.20%