Quarterly report pursuant to Section 13 or 15(d)

Unaudited Consolidated Balance Sheets (Parenthetical)

v3.19.3.a.u2
Unaudited Consolidated Balance Sheets (Parenthetical) - $ / shares
Sep. 30, 2019
Dec. 31, 2018
Common stock, par value (in dollars per share) $ 0.001 $ 0.001
Common stock, shares authorized (in shares) 88,000,000 580,000,000
Common stock, shares issued (in shares) 45,427,659 11,661,485
Common stock, shares outstanding (in shares) 45,427,659 11,661,485
Preferred stock, shares issued (in shares) 1,707,920  
Series E Preferred Stock [Member]    
Redeemable convertible preferred, par value (in dollars per share) $ 0.001 $ 0.001
Redeemable convertible preferred, shares authorized (in shares) 2,900,000 0
Redeemable convertible preferred, shares issued (in shares) 1,707,920 0
Redeemable convertible preferred, shares outstanding (in shares) 1,707,920 0
Preferred stock, par value (in dollars per share) $ 0.99  
Convertible Series A Preferred Stock [Member]    
Preferred stock, par value (in dollars per share) $ 0 $ 0
Preferred stock, shares issued (in shares) 0 2,391,403
Preferred stock, shares outstanding (in shares) 0 2,391,403