Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity (Detail Textuals)

v3.8.0.1
Stockholders' Equity (Detail Textuals)
$ / shares in Units, $ in Thousands
 1 Months Ended 12 Months Ended
Feb. 09, 2016
USD ($)
$ / shares
shares
Nov. 15, 2017
USD ($)
$ / shares
shares
Feb. 27, 2016
shares
Dec. 31, 2017
USD ($)
$ / shares
shares
Dec. 31, 2016
$ / shares
shares
Jan. 19, 2016
$ / shares
shares
Oct. 16, 2013
$ / shares
shares
Class of Stock [Line Items]              
Common stock, shares authorized       75,000,000 75,000,000    
Common stock, par value per share (in dollars per share) | $ / shares       $ 0.0001 $ 0.0001    
Preferred stock, shares authorized       10,000,000 10,000,000    
Preferred stock, par value per share (in dollars per share) | $ / shares       $ 0.0001 $ 0.0001    
Common stock, shares outstanding       27,152,101 25,050,628    
Preferred stock, shares outstanding       0 0    
Maximum number of shares available for purchase for rights offering (in shares)           1,454,545  
Rights conversion ratio into shares for rights offering           1  
Exercise price (in dollars per share) | $ / shares $ 2.75         $ 2.75  
Issuance of common stock | $ $ 4,000     $ 2,183      
Issuance of stock (in shares) 1,454,545            
Net proceeds form issuance of stock from rights offering | $ $ 3,800            
Number of shares exchanged for warrants exercised (in shares)             5,800,000
Exercise price of warrants (in dollars per share) | $ / shares             $ 5.00
Securities purchase agreement              
Class of Stock [Line Items]              
Issuance of common stock | $   $ 2,600          
Issuance of stock (in shares)   1,750,000          
Registered direct offering price per share | $ / shares   $ 1.50          
Number of shares exchanged for warrants exercised (in shares)   875,000          
Exercise price of warrants (in dollars per share) | $ / shares   $ 1.63          
The One Group              
Class of Stock [Line Items]              
Number of shares exchanged for warrants exercised (in shares)             5,800,000
Exercise price of warrants (in dollars per share) | $ / shares             $ 5.00
Initial Stockholders              
Class of Stock [Line Items]              
Shares of stock forfeited (in shares)     1,400,000