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LEASES (Details) - USD ($)
 3 Months Ended
Mar. 30, 2019
Mar. 31, 2018
Dec. 30, 2018
Dec. 29, 2018
Leases [Abstract]        
Percent of future lease commitments related to real estate leases 86.00%      
Operating lease cost $ 301,000 $ 357,000    
Operating Lease Liabilities, Payments Due [Abstract]        
2019 (excluding the three months ended March 30, 2019) 903,000      
2020 1,223,000      
2021 1,032,000      
2022 656,000      
Lessee, Operating Lease, Liability, Payments, Due Year Five 204,000      
2023       $ 201,000
Thereafter 0      
Total future lease payments 4,018,000      
Less imputed interest (430,000)      
Total 3,588,000      
Operating Leases, Future Minimum Payments, Due Thereafter       0
Operating lease liabilities—current 1,002,309   $ 1,000,000 0
Operating lease liabilities—noncurrent 2,585,906     0
Total lease liabilities 3,588,215   $ 3,800,000  
Cash paid for amounts included in the measurement of operating lease liabilities 298,000      
Right-of-use assets obtained in exchange for new operating lease obligations $ 243,000      
Weighted Average Discount Rate—Operating Leases 6.11%      
Weighted Average Remaining Lease Term—Operating Leases (in years) 3 years 8 months 23 days      
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]        
2019       1,210,000
2020       1,112,000
2021       921,000
2022       616,000
Total       $ 4,060,000