v3.19.3

Condensed Consolidated Statements of Convertible Preferred Stock and Stockholders' Equity (Deficit) - USD ($)	Total	Initial Public Offering	Initial Public Offering Convertible Notes	Common Stock	Common Stock Initial Public Offering	Common Stock Initial Public Offering Convertible Notes	Additional Paid-in Capital	Additional Paid-in Capital Initial Public Offering	Additional Paid-in Capital Initial Public Offering Convertible Notes	Accumulated Deficit	Series A Convertible Preferred Stock	Series A Convertible Preferred Stock Initial Public Offering	Series B Convertible Preferred Stock	Series B Convertible Preferred Stock Initial Public Offering	Series B-1 Convertible Preferred Stock	Series B-1 Convertible Preferred Stock Initial Public Offering	Series C Convertible Preferred Stock	Series C Convertible Preferred Stock Initial Public Offering	Series D Convertible Preferred Stock	Series D Convertible Preferred Stock Initial Public Offering	Series D-1 Convertible Preferred Stock	Series D-1 Convertible Preferred Stock Initial Public Offering
Convertible Preferred Stock, Beginning Balance (shares) at Dec. 31, 2017											345,587		8,058,170		3,437,950		23,357,047		20,652,486		66,141,257
Convertible Preferred Stock, Beginning Balance at Dec. 31, 2017											$ 61,847		$ 842,845		$ 359,593		$ 5,547,841		$ 4,838,379		$ 31,359,632
Convertible Preferred Stock, Ending Balance (shares) at Mar. 31, 2018											345,587		8,058,170		3,437,950		23,357,047		20,652,486		66,141,257
Convertible Preferred Stock, Ending Balance at Mar. 31, 2018											$ 61,847		$ 842,845		$ 359,593		$ 5,547,841		$ 4,838,379		$ 31,359,632
Beginning Balance (shares) at Dec. 31, 2017				77,257
Beginning Balance at Dec. 31, 2017	$ (50,227,211)			$ 8			$ 4,038,817			$ (54,266,036)
Equity
Stock option exercises (shares)				237
Stock option exercises	305						305
Stock-based compensation expense	54,444						54,444
Net loss	(3,847,362)									(3,847,362)
Ending Balance (shares) at Mar. 31, 2018				77,494
Ending Balance at Mar. 31, 2018	(54,019,824)			$ 8			4,093,566			(58,113,398)
Convertible Preferred Stock, Beginning Balance (shares) at Dec. 31, 2017											345,587		8,058,170		3,437,950		23,357,047		20,652,486		66,141,257
Convertible Preferred Stock, Beginning Balance at Dec. 31, 2017											$ 61,847		$ 842,845		$ 359,593		$ 5,547,841		$ 4,838,379		$ 31,359,632
Beginning Balance (shares) at Dec. 31, 2017				77,257
Beginning Balance at Dec. 31, 2017	(50,227,211)			$ 8			4,038,817			(54,266,036)
Equity
Stock option exercises (shares)				1,856
Net loss	(12,084,936)
Ending Balance (shares) at Sep. 30, 2018				10,032,687
Ending Balance at Sep. 30, 2018	15,235,023			$ 1,002			81,584,992			(66,350,971)
Convertible Preferred Stock, Beginning Balance (shares) at Mar. 31, 2018											345,587		8,058,170		3,437,950		23,357,047		20,652,486		66,141,257
Convertible Preferred Stock, Beginning Balance at Mar. 31, 2018											$ 61,847		$ 842,845		$ 359,593		$ 5,547,841		$ 4,838,379		$ 31,359,632
Convertible Preferred Stock, Ending Balance (shares) at Jun. 30, 2018											345,587		8,058,170		3,437,950		23,357,047		20,652,486		66,141,257
Convertible Preferred Stock, Ending Balance at Jun. 30, 2018											$ 61,847		$ 842,845		$ 359,593		$ 5,547,841		$ 4,838,379		$ 31,359,632
Beginning Balance (shares) at Mar. 31, 2018				77,494
Beginning Balance at Mar. 31, 2018	(54,019,824)			$ 8			4,093,566			(58,113,398)
Equity
Stock option exercises (shares)				551
Stock option exercises	707						707
Stock-based compensation expense	52,982						52,982
Net loss	(3,311,476)									(3,311,476)
Ending Balance (shares) at Jun. 30, 2018				78,045
Ending Balance at Jun. 30, 2018	(57,277,611)			$ 8			4,147,255			(61,424,874)
Convertible Preferred Stock
Conversion of preferred stock upon IPO (shares)												(345,587)		(8,058,170)		(3,437,950)		(23,357,047)		(20,652,486)		(66,141,257)
Conversion of preferred stock upon IPO												$ (61,847)		$ (842,845)		$ (359,593)		$ (5,547,841)		$ (4,838,379)		$ (31,359,632)
Equity
Stock option exercises (shares)				1,068
Stock option exercises	2,487						2,487
Issue common stock (shares)				3,864,000
Issue common stock	19,389,978			$ 386			19,389,592
Conversion upon IPO ( shares)					2,850,280	3,239,294
Conversion upon IPO		$ 43,010,137	$ 14,898,327		$ 285	$ 323		$ 43,009,852	$ 14,898,004
Conversion of preferred stock warrants into common stock warrants	84,676						84,676
Stock-based compensation expense	53,126						53,126
Net loss	(4,926,097)									(4,926,097)
Ending Balance (shares) at Sep. 30, 2018				10,032,687
Ending Balance at Sep. 30, 2018	15,235,023			$ 1,002			81,584,992			(66,350,971)
Beginning Balance (shares) at Dec. 31, 2018				10,055,072
Beginning Balance at Dec. 31, 2018	10,137,351			$ 1,004			82,898,775			(72,762,428)
Equity
Stock option exercises (shares)				41,521
Stock option exercises	53,976			$ 4			53,972
Issue common stock (shares)				748,427
Issue common stock	2,409,593			$ 75			2,409,518
Stock-based compensation expense	289,395						289,395
Net loss	(7,851,743)									(7,851,743)
Issue warrants for debt	629,830						629,830
Issue stock for debt	201,789						201,789
Ending Balance (shares) at Mar. 31, 2019				10,845,020
Ending Balance at Mar. 31, 2019	5,870,191			$ 1,083			86,483,279			(80,614,171)
Beginning Balance (shares) at Dec. 31, 2018				10,055,072
Beginning Balance at Dec. 31, 2018	10,137,351			$ 1,004			82,898,775			(72,762,428)
Equity
Stock option exercises (shares)				50,047
Net loss	$ (21,914,475)
ESPP Purchases (shares)	66,155
Ending Balance (shares) at Sep. 30, 2019				10,897,522
Ending Balance at Sep. 30, 2019	$ (7,378,516)			$ 1,088			87,297,299			(94,676,903)
Beginning Balance (shares) at Mar. 31, 2019				10,845,020
Beginning Balance at Mar. 31, 2019	5,870,191			$ 1,083			86,483,279			(80,614,171)
Equity
Stock option exercises (shares)				8,526
Stock option exercises	11,084			$ 1			11,083
Stock-based compensation expense	335,666						335,666
Net loss	(7,664,566)									(7,664,566)
ESPP Purchases (shares)				43,976
ESPP Purchases	102,815			$ 4			102,811
Ending Balance (shares) at Jun. 30, 2019				10,897,522
Ending Balance at Jun. 30, 2019	(1,344,810)			$ 1,088			86,932,839			(88,278,737)
Equity
Stock option exercises (shares)				0
Stock-based compensation expense	364,460						364,460
Net loss	(6,398,166)									(6,398,166)
Ending Balance (shares) at Sep. 30, 2019				10,897,522
Ending Balance at Sep. 30, 2019	$ (7,378,516)			$ 1,088			$ 87,297,299			$ (94,676,903)

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