Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity (Details)

v3.19.1
Stockholders' Equity (Details) - $ / shares
1 Months Ended 3 Months Ended
Nov. 16, 2018
Mar. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Weighted-Average Exercise Price Per Share, Granted $ 5.70  
Employee Stock Option [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Number of Shares Subject to Options, Balance beginning   135,023
Number of Shares Subject to Options, Granted   53,572
Number of Shares Subject to Options, Balance ending   188,595
Number of Shares Subject to Options, Exercisable   188,595
Weighted-Average Exercise Price Per Share, Balance beginning   $ 7.70
Weighted-Average Exercise Price Per Share, Granted   5.49
Weighted-Average Exercise Price Per Share, Exercised   0
Weighted-Average Exercise Price Per Share, Cancelled/Forfeited   0
Weighted-Average Exercise Price Per Share, Balance ending   2.22
Weighted-Average Exercise Price Per Share, Exercisable   $ 2.22
Warrant [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Number of Shares Subject to Options, Balance beginning   236,825
Number of Shares Subject to Options, Granted   34,395
Number of Shares Subject to Options, Exercised   (61,023)
Number of Shares Subject to Options, Cancelled/Forfeited   0
Number of Shares Subject to Options, Balance ending   210,197
Number of Shares Subject to Options, Exercisable   210,197
Weighted-Average Exercise Price Per Share, Balance beginning   $ 27.84
Weighted-Average Exercise Price Per Share, Granted   0
Weighted-Average Exercise Price Per Share, Exercised   5.51
Weighted-Average Exercise Price Per Share, Cancelled/Forfeited   0
Weighted-Average Exercise Price Per Share, Balance ending   2.33
Weighted-Average Exercise Price Per Share, Exercisable   $ 2.33