Annual report pursuant to Section 13 and 15(d)

Capitalization and Equity Structure (Details)

v3.8.0.1
Capitalization and Equity Structure (Details) - $ / shares
shares in Thousands
 1 Months Ended 12 Months Ended
Apr. 30, 2017
Dec. 31, 2015
Dec. 31, 2017
Sep. 30, 2017
Dec. 31, 2016
Schedule of Capitalization, Equity [Line Items]          
Merger/PPO Warrant Shares Outstanding     3,396   3,597
Merger/PPO Warrant Shares Issued     2,066    
Merger/PPO Warrant Shares Repurchased [1]     (1,866)    
Merger/PPO Warrant Shares Expired     (371)    
Merger/PPO Warrant Shares Exercised     (30)    
2017 Warrants [Member]          
Schedule of Capitalization, Equity [Line Items]          
Exercise price $ 4.10   $ 4.1    
Warrant term     5 years    
Merger/PPO Warrant Shares Outstanding     0   0
Merger/PPO Warrant Shares Issued 1,866   1,866    
Merger/PPO Warrant Shares Repurchased [1]     (1,866)    
Merger/PPO Warrant Shares Expired     0    
Merger/PPO Warrant Shares Exercised     0    
2015 Warrants [Member]          
Schedule of Capitalization, Equity [Line Items]          
Exercise price     $ 3.74    
Warrant term     5 years    
Merger/PPO Warrant Shares Outstanding     1,604   1,634
Merger/PPO Warrant Shares Issued   2,122 0    
Merger/PPO Warrant Shares Repurchased [1]     0    
Merger/PPO Warrant Shares Expired     0    
Merger/PPO Warrant Shares Exercised     (30)    
Placement agent warrants [Member]          
Schedule of Capitalization, Equity [Line Items]          
Exercise price     $ 7    
Warrant term     5 years    
Merger/PPO Warrant Shares Outstanding     426   426
Merger/PPO Warrant Shares Issued     0    
Merger/PPO Warrant Shares Repurchased [1]     0    
Merger/PPO Warrant Shares Expired     0    
Merger/PPO Warrant Shares Exercised     0    
Bridge warrants [Member]          
Schedule of Capitalization, Equity [Line Items]          
Exercise price     $ 7    
Warrant term     3 years    
Merger/PPO Warrant Shares Outstanding     0   371
Merger/PPO Warrant Shares Issued     0    
Merger/PPO Warrant Shares Repurchased [1]     0    
Merger/PPO Warrant Shares Expired     (371)    
Merger/PPO Warrant Shares Exercised     0    
PPO warrants [Member]          
Schedule of Capitalization, Equity [Line Items]          
Exercise price     $ 14    
Warrant term     5 years    
Merger/PPO Warrant Shares Outstanding     1,078   1,078
Merger/PPO Warrant Shares Issued     0    
Merger/PPO Warrant Shares Repurchased [1]     0    
Merger/PPO Warrant Shares Expired     0    
Merger/PPO Warrant Shares Exercised     0    
Pre 2014 Warrants [Member]          
Schedule of Capitalization, Equity [Line Items]          
Exercise price     $ 9.66    
Merger/PPO Warrant Shares Outstanding     88   88
Merger/PPO Warrant Shares Issued     0    
Merger/PPO Warrant Shares Repurchased [1]     0    
Merger/PPO Warrant Shares Expired     0    
Merger/PPO Warrant Shares Exercised     0    
Pre 2014 Warrants [Member] | Minimum [Member]          
Schedule of Capitalization, Equity [Line Items]          
Warrant term     9 years    
Pre 2014 Warrants [Member] | Maximum [Member]          
Schedule of Capitalization, Equity [Line Items]          
Warrant term     10 years    
Information Agent Warrants [Member]          
Schedule of Capitalization, Equity [Line Items]          
Exercise price     $ 1.5 $ 1.50  
Warrant term     3 years    
Merger/PPO Warrant Shares Outstanding     200   0
Merger/PPO Warrant Shares Issued     200    
Merger/PPO Warrant Shares Repurchased [1]     0    
Merger/PPO Warrant Shares Expired     0    
Merger/PPO Warrant Shares Exercised     0    
[1] The April 2017 Warrants were repurchased at a price of $1.23 per underlying share, as a result of the August 2017 Rights Offering.