Annual report pursuant to Section 13 and 15(d)

Income Taxes - Additional Information (Details)

v3.20.4
Income Taxes - Additional Information (Details) - USD ($)
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Income Tax Disclosure [Abstract]      
Valuation allowance $ 3,877,000 $ 8,583,000  
Tax benefit from Section 179D credits and deductions   29,700,000  
Unrecognized tax benefits that would impact effective tax rate 190,000 80,000  
Earnings with no repatriation tax 0    
Amount of (decrease) increase included in tax expense for interest and penalties related to uncertain tax positions $ 0 $ 19,000 $ (50,000)