Annual report pursuant to Section 13 and 15(d)

EMPLOYEE BENEFIT PLAN (Details)

v3.10.0.1
EMPLOYEE BENEFIT PLAN (Details) - USD ($)
$ in Thousands
12 Months Ended
Jan. 01, 2019
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Retirement Benefits [Abstract]        
Employee minimum service period 60 days 6 months    
Employee maximum annual contribution $ 19 $ 15    
Annual vesting percentage of company contributions 25.00% 25.00%    
Vesting term 4 years 5 years    
Employer match percentage of employee contribution 100.00% 20.00%    
Maximum annual match, percentage of gross salary 6.00% 10.00%    
Plan expense   $ 300 $ 200 $ 200