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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Changes In The Allowance For Credit Losses (Details) - USD ($)
3 Months Ended
Mar. 28, 2021
Mar. 29, 2020
Accounts Receivable, Allowance for Credit Loss [Roll Forward]    
Beginning balance $ 492,087 $ 468,233
EdgeRock Technology Holdings, Inc. (“EdgeRock”) acquisition 0 47,498
Provision for credit losses, net 34,758 31,658
Amounts written off, net (34,758) (28,908)
Ending balance $ 492,087 $ 518,481