Quarterly report pursuant to Section 13 or 15(d)

Retirement Benefit Plan (Details)

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Retirement Benefit Plan (Details) - USD ($)
3 Months Ended 9 Months Ended
Jul. 01, 2018
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Retirement Benefits [Abstract]          
Employer matching contribution, percent of match 50.00%        
Maximum employer contribution per pay period       $ 200  
Maximum employer contribution per year       $ 4,800  
Employer matching contribution, vesting percentage       100.00%  
Contributions   $ 300,000 $ 200,000 $ 800,000 $ 600,000