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COMMITMENTS AND CONTINGENCIES (Narrative) (Details) - USD ($)
 3 Months Ended
Apr. 02, 2019
Jan. 02, 2019
Mar. 21, 2018
Mar. 31, 2019
Dec. 31, 2018
Loss Contingencies [Line Items]          
Interest rate (as a percent)   8.00%      
Accounts Payable          
Loss Contingencies [Line Items]          
Other Commitment       $ 1,300,000 $ 1,500,000
Settlement Agreements          
Loss Contingencies [Line Items]          
Repayments of debt to service provider   $ 600,000   200,000  
Outstanding debt   1,500,000      
(Gain) loss on extinguishment of debt   $ 900,000      
XIFIN, Inc.          
Loss Contingencies [Line Items]          
Loss contingency, damages sought       270,000  
Loss contingency accrual       100,000  
CPA Global          
Loss Contingencies [Line Items]          
Loss contingency, damages sought       200,000  
Loss contingency accrual       $ 100,000 $ 100,000
Bio-Rad Laboratories          
Loss Contingencies [Line Items]          
Litigation settlement in favor of other party, amount     $ 39,000    
Loss Contingency Accrual, Payments     $ 39,000    
Bio-Rad Laboratories | Subsequent Events          
Loss Contingencies [Line Items]          
Loss Contingency Accrual, Payments $ 0        
Damages paid $ 39,000