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Basis of Presentation and Summary Accounting Policies - Additional Information (Detail) - USD ($)	3 Months Ended		12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016	Dec. 31, 2015
Schedule Of Significant Accounting Policies [Line Items]
Percentage of total annual net sales in the third and fourth quarters			61.00%	59.00%
Shipping and handling revenue	$ 561,000	$ 536,000
Restructuring expenses	0	$ 641,000
Retained earnings	58,979,000		$ 60,981,000
Accounting Standards Update 2016-09
Schedule Of Significant Accounting Policies [Line Items]
Retained earnings			$ (46,000)
Receivables purchase agreement
Schedule Of Significant Accounting Policies [Line Items]
Sale of Receivable	21,600,000
Receivables purchase agreement \| Selling, general and administrative expenses
Schedule Of Significant Accounting Policies [Line Items]
Charge related to sale of receivables	$ 67,000