FAIR VALUE MEASUREMENT - Contingent Consideration (Details)	Dec. 28, 2019 USD ($)
Risk-free interest rate | Minimum
FAIR VALUE MEASUREMENT
Contingent consideration liability measurement input	1.60
Risk-free interest rate | Maximum
FAIR VALUE MEASUREMENT
Contingent consideration liability measurement input	2.30
Expected term (years) | Minimum
FAIR VALUE MEASUREMENT
Contingent consideration liability measurement input	0.40
Expected term (years) | Maximum
FAIR VALUE MEASUREMENT
Contingent consideration liability measurement input	3.20