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LEASES - Supplemental Cash Flow Information Related to Leases (Details) - USD ($)
3 Months Ended
Mar. 28, 2021
Mar. 29, 2020
Leases [Abstract]    
Cash paid for operating leases $ 579,316 $ 505,531
Operating lease costs 523,296 491,019
Short-term lease costs $ 48,101 $ 126,378