Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity - Warrants (Details)

v3.19.2
Stockholders' Equity - Warrants (Details) - Warrants under National Securities, Inc Note [Member]
$ / shares in Units, $ in Thousands
 6 Months Ended
Jun. 30, 2019
USD ($)
$ / shares
shares
Dec. 31, 2018
USD ($)
Class of Warrant or Right [Line Items]    
Beginning Balance (in shares) | shares 102,597  
Exercised (in shares) | shares (58,700)  
Ending Balance (in shares) | shares 43,897  
Aggregate Intrinsic Value | $ $ 267 $ 544
Weighted Average [Member]    
Class of Warrant or Right [Line Items]    
Beginning Balance (in dollars per shares) | $ / shares $ 0.0976  
Exercised (in dollars per share) | $ / shares 0.0001  
Ending Balance (in dollars per shares) | $ / shares $ 0.2279