Consolidated Balance Sheets (Parenthetical) - $ / shares	Sep. 30, 2019	Sep. 30, 2018
Preferred stock, par value	$ 0.00001	$ 0.00001
Preferred stock, share authorized	10,000,000	0
Preferred stock, share issued	0	0
Preferred stock, share outstanding	0	0
Common stock, par value	$ 0.00001	$ 0.00001
Common stock, share authorized	100,000,000	21,210,000
Common stock, share issued	32,872,675	3,206,048
Common stock, share outstanding	32,872,675	3,206,048
Series A Redeemable Convertible Preferred Stock [Member]
Redeemable convertible preferred stock, par value	$ 0.00001	$ 0.00001
Redeemable convertible preferred stock, share authorized	0	2,854,576
Redeemable convertible preferred stock, share issued	0	2,817,723
Redeemable convertible preferred stock, share outstanding	0	2,817,723
Series B Redeemable Convertible Preferred Stock [Member]
Redeemable convertible preferred stock, par value	$ 0.00001	$ 0.00001
Redeemable convertible preferred stock, share authorized	0	3,331,878
Redeemable convertible preferred stock, share issued	0	3,315,645
Redeemable convertible preferred stock, share outstanding		3,315,645
Series C Redeemable Convertible Preferred Stock [Member]
Redeemable convertible preferred stock, par value	$ 0.00001	$ 0.00001
Redeemable convertible preferred stock, share authorized	0	2,510,354
Redeemable convertible preferred stock, share issued	0	2,491,483
Redeemable convertible preferred stock, share outstanding	0	2,491,483
Series D Redeemable Convertible Preferred Stock [Member]
Redeemable convertible preferred stock, par value	$ 0.00001	$ 0.00001
Redeemable convertible preferred stock, share authorized	0	10,475,252
Redeemable convertible preferred stock, share issued	0	10,326,454
Redeemable convertible preferred stock, share outstanding	0	10,326,454