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COVID-19 PANDEMIC AND CARES ACT (Details)
$ in Millions
12 Months Ended
Dec. 27, 2020
USD ($)
Dec. 31, 2020
USD ($)
Intallment
COVID-19 [Abstract]    
Total amount expected to be received under CARES Act   $ 27.4
Number of installments used to allocated funds to schools | Intallment   2
Emergency grants available in first installment under CARES Act   $ 13.7
Emergency grants distributed to students under CARES Act   13.3
Emergency grants available in second installment under CARES Act   13.7
Utilized amount of permitted expenses   5.8
Deferred payments under CARES Act   4.5
CRRSAA provided an additional amount to Education Stabilization Fund $ 81,900.0  
Amount included in Education Stabilization Fund for HEERF $ 22,700.0  
DOE allocated amount to schools   $ 15.4