Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity - Schedule of Convertible Preferred Stock Activity (Details)

v3.8.0.1
Stockholders' Equity - Schedule of Convertible Preferred Stock Activity (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Balance $ (10,301) $ (9,942) [1]
Stock Incentive to Investors   35
Series F adjustment to transfer agent records  
Series F issued to directors and employees for compensation   152
Conversion of Series D to Common Stock  
Conversion of Series F to Common Stock  
Balance 8,033 (10,301)
Series D Convertible Preferred Stock [Member]    
Balance $ 18
Balance, shares 1,830,759
Stock Incentive to Investors
Stock Incentive to Investors, shares
Series F adjustment to transfer agent records
Series F adjustment to transfer agent records, shares
Series F issued to directors and employees for compensation
Series F issued to directors and employees for compensation, shares
Conversion of Series D to Common Stock $ (18)
Conversion of Series D to Common Stock, shares (1,830,759)
Conversion of Series F to Common Stock
Conversion of Series F to Common Stock, shares
Balance
Balance, shares
Series F Convertible Preferred Stock [Member]    
Balance $ 2
Balance, shares 525,559
Stock Incentive to Investors $ 3
Stock Incentive to Investors, shares 285,664
Series F adjustment to transfer agent records $ 1
Series F adjustment to transfer agent records, shares 48,250
Series F issued to directors and employees for compensation $ 2
Series F issued to directors and employees for compensation, shares 231,041
Conversion of Series D to Common Stock
Conversion of Series D to Common Stock, shares
Conversion of Series F to Common Stock $ (11)
Conversion of Series F to Common Stock, shares (1,090,514)
Balance
Balance, shares
Preferred Stock [Member]    
Balance $ 23
Balance, shares 795 2,357,113
Stock Incentive to Investors $ 3
Stock Incentive to Investors, shares 285,664
Series F adjustment to transfer agent records $ 1
Series F adjustment to transfer agent records, shares 48,250
Series F issued to directors and employees for compensation $ 2
Series F issued to directors and employees for compensation, shares 231,041
Conversion of Series D to Common Stock $ (18)
Conversion of Series D to Common Stock, shares (1,830,759)
Conversion of Series F to Common Stock $ (11)
Conversion of Series F to Common Stock, shares (1,090,514)
Balance
Balance, shares 795 795
Series A Convertible Preferred Stock [Member]    
Balance
Balance, shares 500 500
Stock Incentive to Investors
Stock Incentive to Investors, shares
Series F adjustment to transfer agent records
Series F adjustment to transfer agent records, shares
Series F issued to directors and employees for compensation
Series F issued to directors and employees for compensation, shares
Conversion of Series D to Common Stock
Conversion of Series D to Common Stock, shares
Conversion of Series F to Common Stock
Conversion of Series F to Common Stock, shares
Balance
Balance, shares 500 500
Series A-1 Convertible Preferred Stock [Member]    
Balance
Balance, shares 295 295
Stock Incentive to Investors
Stock Incentive to Investors, shares
Series F adjustment to transfer agent records
Series F adjustment to transfer agent records, shares
Series F issued to directors and employees for compensation
Series F issued to directors and employees for compensation, shares
Conversion of Series D to Common Stock
Conversion of Series D to Common Stock, shares
Conversion of Series F to Common Stock
Conversion of Series F to Common Stock, shares
Balance
Balance, shares 295 295
[1] Includes adjustment for the transfer agent shares effected for the 1 for 25 reverse split on November 11, 2017.