Annual report pursuant to Section 13 and 15(d)

Subsequent Events - February 2020 Private Placement (Details)

v3.20.1
Subsequent Events - February 2020 Private Placement (Details)
Mar. 22, 2020
USD ($)
Feb. 28, 2020
USD ($)
item
$ / shares
shares
Dec. 31, 2019
$ / shares
shares
Apr. 18, 2019
shares
Jun. 15, 2018
shares
Jan. 31, 2017
$ / shares
Warrants to purchase shares of common stock     3,222 255,102 208,350  
Exercise price of warrants | $ / shares     $ 5.40     $ 5.40
Subsequent Event [Member] | Private Placement [Member]            
Number of escrow drawdowns | item   4        
Number of unit issues , Value | $   $ 835,000        
Number of shares per unit   1        
Number of warrants per unit   0.50        
Share Price | $ / shares   $ 0.4585        
Gross proceeds from issuance of units | $ $ 1,700,000 $ 835,000        
Warrants to purchase shares of common stock   906,390        
Exercise price of warrants | $ / shares   $ 0.49        
Threshold notice period for increase in beneficial ownership interest   61 days        
Subsequent Event [Member] | Maximum [Member] | Private Placement [Member]            
Beneficial ownership interest   9.99%        
Subsequent Event [Member] | Minimum [Member] | Private Placement [Member]            
Beneficial ownership interest   4.99%