Convertible Preferred Stock and Stockholders' Equity (Tables)

6 Months Ended

Jun. 30, 2018

Temporary Equity Disclosure [Abstract]

Summary of Changes in Convertible Preferred Stock and Stockholders' Equity (Deficit)

The following table provides a rollforward of the changes in convertible preferred stock and stockholders’ equity (deficit) for the six months ended June 30, 2018:

	Convertible Preferred Stock $0.0001 Par Value						Common Stock $0.0001 Par Value				Additional Paid-in		Accumulated Other Comprehensive			Accumulated			Total Stockholders’ Equity
	Shares			Amount			Shares		Amount		Capital		Loss			Deficit			(Deficit)
Balance, January 1, 2018		127,199,705		$	137,762,160			2,637,011	$	264	$	799,859	$	(73,308	)	$	(40,180,866	)	$	(39,454,051	)
Conversion of convertible preferred stock    into common stock upon initial    public offering		(127,199,705	)		(137,762,160	)		24,168,656		2,417		137,759,743		—			—			137,762,160
Issuance of common stock in initial    public offering, net of discounts    and issuance costs		—			—			10,350,000		1,035		150,842,180		—			—			150,843,215
Vesting of common stock from    option exercise		—			—			61,501		6		5,744		—			—			5,750
Issuance of common stock    from option exercise		—			—			37,734		4		85,297		—			—			85,301
Stock-based compensation		—			—			—		—		949,192		—			—			949,192
Comprehensive gain		—			—			—		—		—		24,662			—			24,662
Net loss		—			—			—		—		—		—			(23,417,798	)		(23,417,798	)
Balance, June 30, 2018		—		$	—			37,254,902	$	3,726	$	290,442,015	$	(48,646	)	$	(63,598,664	)	$	226,798,431