Quarterly report pursuant to Section 13 or 15(d)

SALE OF COMMON STOCK (Details Narrative)

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SALE OF COMMON STOCK (Details Narrative) - USD ($)
$ / shares in Units, $ in Thousands
9 Months Ended
Oct. 02, 2018
May 01, 2018
Sep. 28, 2017
Apr. 13, 2017
Apr. 04, 2017
Mar. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Number of shares issued             54,000  
Gross proceeds from stock issuance             $ 6,352 $ 17,387
Offering expenses             $ 172 $ 1,168
2017 Purchase Agreement [Member]                
Number of shares issued             45,000  
2017 Purchase Agreement [Member] | Lincoln Park Capital Fund, LLC ("Lincoln Park") [Member]                
Number of shares issued     15,000,000          
Description of common stock sale requirement under applicable rule     <p style="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in; background-color: white"><font style="font: 10pt Times New Roman, Times, Serif">Under applicable rules of the NASDAQ Global Market, the Company could not issue or sell more than 19.99% of the shares of its common stock outstanding immediately prior to the execution of the 2017 Purchase Agreement (1.5 million shares) to Lincoln Park under the 2017 Purchase Agreement without stockholder approval, unless the average price of all applicable sales of its common stock to Lincoln Park under the 2017 Purchase Agreement equals or exceeds a threshold amount ($4.5178 per share). As the Company has issued 1.5 million shares to Lincoln Park under the 2017 Purchase Agreement at less than the threshold amount, the Company will not sell any additional shares under the 2017 Purchase Agreement without shareholder approval.</font></p>          
Purchase Agreement and Registration Rights Agreement [Member] | Lincoln Park Capital Fund, LLC ("Lincoln Park") [Member]                
Number of shares issued     73,039          
Addition number of shares issued     300,000          
Sales Agreement [Member] | Cowen and Company LLC [Member] | Subsequent Event [Member]                
Number of shares issued 3,300,000              
Gross proceeds from stock issuance $ 2,200              
Net of expenses $ 69              
Sales Agreement [Member] | Cowen and Company LLC [Member] | At-The-Market Offering [Member]                
Number of shares issued             1,600,000  
Net proceeds from issuance of common stock   $ 9,500            
Percentage of selling commission   3.00%            
Underwriting Agreement [Member] | Underwriters (2017 Underwriters) [Member] | April 2017 Financing [Member]                
Number of shares issued           1,800,000    
Net proceeds from issuance of common stock         $ 7,200      
Share price (in dollars per share)           $ 4.45    
Underwriting discount         $ 600      
Underwriting discount per share (in dollars per share)         $ 0.31      
Offering expenses         $ 200      
Percentage of underwriting discount         7.00%      
Underwriting Agreement [Member] | Underwriters (2017 Underwriters) [Member] | Over-Allotment Option [Member]                
Number of shares issued           270,000    
April 2017 Financing [Member] | Underwriters (2017 Underwriters) [Member] | Over-Allotment Option [Member]                
Number of shares issued       270,000        
Net proceeds from issuance of common stock       $ 1,100        
Underwriting discount       $ 100        
Underwriting discount per share (in dollars per share)       $ 0.31