Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity (Detail Textuals)

v3.19.1
Stockholders' Equity (Detail Textuals) - USD ($)
$ / shares in Units, $ in Thousands
 1 Months Ended 3 Months Ended 12 Months Ended
Nov. 15, 2017
Sep. 30, 2018
Dec. 31, 2018
Dec. 31, 2017
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)     $ 0.0001 $ 0.0001
Preferred stock, shares authorized     10,000,000 10,000,000
Preferred stock, par value per share (in dollars per share)     $ 0.0001 $ 0.0001
Common stock, shares outstanding     28,313,017 27,152,101
Preferred stock, shares outstanding     0 0
Issuance of common stock     $ 1,223 $ 2,183
Number of shares exchanged for warrants exercised (in shares)     125,000  
Exercise price of warrants (in dollars per share)   $ 1.63    
Proceeds from Stock Options Exercised   $ 1,200    
NumberOfWarrantExercised   750,000    
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 $ 1.50      
Number of shares exchanged for warrants exercised (in shares) 875,000      
Exercise price of warrants (in dollars per share) $ 1.63