Quarterly report pursuant to Section 13 or 15(d)

Shareholders' Equity - Warrants (Details)

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Shareholders' Equity - Warrants (Details)
9 Months Ended
Nov. 03, 2018
$ / shares
shares
Class of Warrant or Right [Line Items]  
Shares of common stock purchasable 3,849,365
Warrant exercise period 5 years
Warrants Granted September 2016 [Member]  
Class of Warrant or Right [Line Items]  
Shares of common stock purchasable 2,976,190
Warrant exercise price per share | $ / shares $ 2.90
Expiration Date, warrants Sep. 19, 2021
Warrants Granted November 2016 [Member]  
Class of Warrant or Right [Line Items]  
Shares of common stock purchasable 333,873
Warrant exercise price per share | $ / shares $ 3.00
Expiration Date, warrants Nov. 10, 2021
Warrants Granted January 2017 [Member]  
Class of Warrant or Right [Line Items]  
Shares of common stock purchasable 489,302
Warrant exercise price per share | $ / shares $ 1.76
Expiration Date, warrants Jan. 23, 2022
Warrants Granted March 2017 [Member]  
Class of Warrant or Right [Line Items]  
Shares of common stock purchasable 50,000
Warrant exercise price per share | $ / shares $ 1.92
Expiration Date, warrants Mar. 16, 2022