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Stockholders' Equity (Details Textual) - USD ($)
$ / shares in Units, $ in Thousands
 1 Months Ended 12 Months Ended
Dec. 28, 2018
Sep. 27, 2018
Aug. 31, 2017
Dec. 31, 2018
Dec. 31, 2017
Nov. 23, 2018
Mar. 31, 2009
Stockholders Equity (Textual)              
Common stock, shares authorized       10,000,000 10,000,000    
Net proceeds from issuance of common stock       $ 4,620 $ 79,079    
Common stock, Description       We have issued or reserved 27,305 more than our available shares of authorized common stock, even though a total of 333,334 warrants cannot be legally exercised. We automatically come into compliance on April 26, 2019, when 44,300 stock options are cancelled because their original issuance terms is reached and we anticipate proposing an increase in our authorized common stock at our 2019 Annual Meeting of Stockholders.      
Warrant agreement, description       Under the terms of the prefunded warrants, the warrant holder prepaid $9.90 of the original $10.00 warrant per share exercise price at the time of issuance of the warrant. The remaining $0.10 exercise price is required to be paid in full prior to the issuance of any common stock under the terms of the prefunded warrant agreement.      
Series B Preferred Stock [Member]              
Stockholders Equity (Textual)              
Preferred stock conversion ratio per share of common stock           132 132.07
Preferred stock, liquidation preference       $ 0.001 $ 0.001    
Preferred stock voting rights description       The holders of shares of Series B Preferred stock have one vote for each share of Series B Preferred stock held by them.      
Preferred stock conversion description       Each share of Series B Preferred stock was convertible into one share of our common stock.      
Securities Purchase Agreement [Member]              
Stockholders Equity (Textual)              
Shares price per share $ 1.60   $ 10.00        
Warrants issued to purchase shares of common stock     9,750,000        
Aggregate shares of common stock, shares       2,000,000      
Issuance of common stock, shares 2,940,767   975,000        
Net proceeds from issuance of common stock $ 4,600   $ 9,100        
Price per share     $ 20.00        
Securities Purchase Agreement [Member] | Mr. Lindell and Mr. Rosberg [Member]              
Stockholders Equity (Textual)              
Beneficial percentage of common stock       19.00%      
Common Stock [Member]              
Stockholders Equity (Textual)              
Issuance of common stock, shares       2,941 975    
Common stock, Description   The Company also filed a certificate of second amendment to its restated certificate of incorporation with the state of Delaware to reduce the number of authorized shares of common stock from 100,000,000 to 10,000,000 shares