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Stockholders' Equity (Details Narrative) - USD ($)
$ / shares in Units, $ in Thousands
 1 Months Ended 12 Months Ended
Apr. 30, 2017
Mar. 31, 2017
Nov. 30, 2016
Jun. 30, 2016
Apr. 30, 2015
Sep. 30, 2014
Aug. 30, 2014
Jun. 30, 2010
Sep. 30, 2004
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2013
Dec. 31, 2009
Jun. 16, 2016
Sale of stock common, shares 30,000 200,000 412,000                      
Common stock at purchase price per share $ 7.78 $ 7.85 $ 6.64                      
Proceeds from offering expenses $ 219 $ 1,554 $ 2,692                      
Reverse stock split       Company effected a stockholder-approved 1-100 reverse split immediately followed by a 2-for-1 forward split. Any fractional share of common stock resulting from the forward split was rounded up to the nearest whole share. The Company refers to the reverse split and to the forward split, together, as the “reverse/forward split.” Any stockholder who, as of immediately prior to the effective time of the reverse split, held fewer than 100 shares of the Company’s common stock in one account and, subsequent to the reverse split             As of immediately prior to the reverse split/forward split, the Company had 92,439,174 of common stock outstanding, and subsequent to the reverse/forward split, it had 1,848,597 shares of common stock outstanding. Approximately $3,000 was paid to cashed-out stockholders who owned less than 100 shares immediately prior to the reverse split.      
Fractional share cash for each such share held price per share       $ 0.12                    
Common stock, shares outstanding                   2,521,000 2,261,000     92,439,174
Paid to cashed out stockholders                   $ 3        
Common stock par value                   $ 0.005 $ 0.005      
Stock-based compensation                   $ 457 $ 419      
Option exercised during period, value                        
Weighted average grant-date fair value per share price                   $ 5.87 $ 6.48      
Unamortized compensation expense                   $ 383        
Unamortized compensation expense remaining service period                   1 year 2 months 16 days        
Preferred Stock authorized                   156,000 156,000      
Preferred stock shares issued                   156,000 156,000      
Preferred Stock, shares outstanding                   156,000 156,000      
Payment of dividend                   $ 16 $ 16      
Preferred Stock                            
Preferred Stock authorized                   10,000,000        
Series A Cumulative Convertible Preferred Stock [Member]                            
Preferred Stock authorized                   5,000,000        
Preferred stock shares issued                   156,000 156,000      
Preferred Stock, shares outstanding                   156,000 156,000      
Dividends payable per share                   $ 0.10 $ 0.10      
Common Stock [Member]                            
Preferred Stock, Liquidation Preference Per Share                   $ 1.00        
Warrants [Member]                            
Warrants issued to purchase number of common stock                   72,000   72,000 60,000  
Fair value of the warrants                       $ 1,379 $ 537  
Risk-free interest rates                       1.06% 2.79%  
Dividend yield                       0.00% 0.00%  
Expected volatility                       80.25% 78.10%  
Term of weighted-average assumptions                       5 years 8 years  
2004 Performance Incentive Plan [Member]                            
Maximum number of shares authorized to issue                 50,000          
Options outstanding                   1,000        
2010 Amended Performance Incentive Plan [Member]                            
Maximum number of shares authorized to issue               120,000            
Options outstanding                   70,000        
Incentive plan expiry description               The Amended 2010 Plan expires in February 2020.            
Number of shares available for grant                   108,000        
2010 Amended Performance Incentive Plan [Member] | Minimum [Member]                            
Maximum number of shares authorized to issue               120,000            
2010 Amended Performance Incentive Plan [Member] | Maximum [Member]                            
Maximum number of shares authorized to issue               240,000            
2014 Inducement Plan [Member]                            
Maximum number of shares authorized to issue             85,000              
Incentive plan expiry description             The 2014 Plan expires in September 2024.              
2014 Inducement Plan [Member] | Mr Krishnan [Member]                            
Option issued to purchase number of additional common stock         15,000 70,000                
2014 Inducement Plan [Member] | First Anniversary [Member]                            
Option expected to vest during period, percentage         25.00%                  
2014 Inducement Plan [Member] | 36 Substantially Equal Monthly Installments Thereafter [Member]                            
Option expected to vest during period, percentage         75.00%