Quarterly report pursuant to Section 13 or 15(d)

Equity (Details Narrative)

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Equity (Details Narrative) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 6 Months Ended
Mar. 31, 2017
Jun. 30, 2017
Jun. 30, 2018
Number of common stock issued, shares 2,793,000 9,900,000  
Warrants to purchase shares of common stock 855,000    
Gross proceeds from equity offerings $ 12,200    
Warrants exercise price description   Each Firm Share and accompanying Base Warrant was sold for a combined effective price of $1.10, and each Pre-Funded Warrant and accompanying Base Warrant was sold for a combined effective price of $1.09.  
Gross proceeds from warrants   $ 13,700  
Net proceeds from warrants   $ 12,300  
Base Warrants [Member]      
Warrants to purchase shares of common stock   12,500,000  
Warrant exercise price   $ 1.25  
Pre-Funded Warrants [Member]      
Warrants to purchase shares of common stock   2,600,000  
Warrant exercise price   $ 0.01 $ 0.01
Termination Agreement [Member] | RedPath Equityholder Representative, LLC [Member]      
Warrants to purchase shares of common stock 100,000    
Warrant term 5 years    
Common stock price, per share $ 4.69    
RedPath Debt Exchange and conversion of Senior Convertible Notes [Member]      
Number of common stock issued, shares 3,795,429