Organization and Summary of Significant Accounting Policies - Additional Information 1 (Details) - USD ($)	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Schedule Of Organization And Presentation Of Financial Statements [Line Items]
Significant financial instruments with off-balance sheet risk	$ 0
Interest and penalties recognized in condensed consolidated statements of income	0
Accrued interest or penalties related to uncertain tax positions	$ 0
Effective income tax rate	24.70%	(12.10%)
Employee social security taxes payable percentage, next twelve months	50.00%
Employee social security taxes payable remaining percentage	50.00%
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
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