Summary of Significant Accounting Policies - Revenue Recognition (Details) - USD ($)	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Disaggregation of Revenue [Line Items]
Net sales	$ 75,673,000	$ 64,083,000
Cost of goods sold	54,047,000	46,192,000
Selling expenses
Disaggregation of Revenue [Line Items]
Cost of goods sold	5,483,000	3,758,000
National
Disaggregation of Revenue [Line Items]
Cost of goods sold	18,289,000	15,498,000
Distributors
Disaggregation of Revenue [Line Items]
Cost of goods sold	40,010,000	33,934,000
Online
Disaggregation of Revenue [Line Items]
Cost of goods sold	11,443,000	6,286,000
Retail
Disaggregation of Revenue [Line Items]
Cost of goods sold	$ 5,931,000	$ 8,365,000