Organization and Summary of Significant Accounting Policies - Additional Information 1 (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Schedule Of Organization And Presentation Of Financial Statements [Line Items]
Significant financial instruments with off-balance sheet risk	$ 0
Interest and penalties recognized in consolidated statements of income		$ 0
Accrued interest or penalties related to uncertain tax positions	$ 0	$ 0
Effective income tax rate	43.80%	21.70%
Trade promotions to customers	$ 3,309,000	$ 3,335,000
Minimum
Schedule Of Organization And Presentation Of Financial Statements [Line Items]
Useful life of property, plant and equipment	3 years
Useful lives of intangible assets	5 years
Maximum
Schedule Of Organization And Presentation Of Financial Statements [Line Items]
Useful life of property, plant and equipment	20 years
Useful lives of intangible assets	25 years
Production Equipment | Minimum
Schedule Of Organization And Presentation Of Financial Statements [Line Items]
Useful life of property, plant and equipment	15 years
Production Equipment | Maximum
Schedule Of Organization And Presentation Of Financial Statements [Line Items]
Useful life of property, plant and equipment	20 years
Production Support Equipment | Minimum
Schedule Of Organization And Presentation Of Financial Statements [Line Items]
Useful life of property, plant and equipment	3 years
Production Support Equipment | Maximum
Schedule Of Organization And Presentation Of Financial Statements [Line Items]
Useful life of property, plant and equipment	10 years
Office Furniture and Equipment | Minimum
Schedule Of Organization And Presentation Of Financial Statements [Line Items]
Useful life of property, plant and equipment	10 years
Office Furniture and Equipment | Maximum
Schedule Of Organization And Presentation Of Financial Statements [Line Items]
Useful life of property, plant and equipment	20 years
Office Equipment | Minimum
Schedule Of Organization And Presentation Of Financial Statements [Line Items]
Useful life of property, plant and equipment	3 years
Office Equipment | Maximum
Schedule Of Organization And Presentation Of Financial Statements [Line Items]
Useful life of property, plant and equipment	5 years