Stockholders Deficit - Additional Information (Details) - USD ($)					1 Months Ended		3 Months Ended			9 Months Ended
	Jan. 31, 2018	Jan. 29, 2018	Jun. 30, 2017	Apr. 30, 2017	Jun. 30, 2018	Jan. 31, 2018	Sep. 30, 2018	Mar. 31, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Class Of Stock [Line Items]
Issuance of common stock from the ATM Offering, Shares								5,733,314
Gross proceeds from issuance of common stock								$ 21,100,000
Sales commission								600,000
Other offering expenses paid								200,000
Net proceeds from issuance of common stock from the ATM Offering								$ 20,200,000
Accelerated vesting of stock options					46,613
Options extended exercise period					1 year
Incremental stock-based compensation expense							$ 0			$ 79,400
Stock-based compensation							257,975		$ 357,405	1,643,353	$ 1,171,988
Selling, General and Administrative
Class Of Stock [Line Items]
Stock-based compensation							200,317		$ 251,924	1,475,975	$ 826,098
Restricted Stock Units R S U
Class Of Stock [Line Items]
Unrecognized compensation expense							766,054			$ 766,054
Compensation expense period expected to be recognized										3 years 6 months
Vested and unissued RSU awards, description										Vested and unissued awards at September 30, 2018 represents RSU awards granted on August 16, 2018 for which the first vesting date was September 30, 2018, but for which issuance of the awards occurred on the next business day, October 1, 2018.
Vested and unissued RSU awards granted date										Aug. 16, 2018
Vested and unissued RSU awards vesting date										Sep. 30, 2018
Vested and unissued RSU awards issuance date										Oct. 01, 2018
Issuance of shares granted										492,051
Restricted stock grant date fair value										$ 3.63
Restricted Stock Units R S U | Executive Officers
Class Of Stock [Line Items]
Issuance of shares granted		259,551
Restricted stock grant date fair value		$ 3.84
Restricted Stock Units R S U | Selling, General and Administrative | Executive Officers
Class Of Stock [Line Items]
Stock-based compensation										$ 1,000,000
Two Thousand Fourteen Equity Incentive Plan | Employee Stock Option
Class Of Stock [Line Items]
Unrecognized compensation expense							$ 1,915,080			$ 1,915,080
Compensation expense period expected to be recognized										3 years 2 months 19 days
Underwritten Public Offering
Class Of Stock [Line Items]
Common stock price per share	$ 2.90					$ 2.90
Issuance of common stock from the ATM Offering, Shares						13,915,000
Net proceeds from initial public offering after underwriters' discounts, commissions and offering expenses						$ 37,700,000
Over-Allotment Option
Class Of Stock [Line Items]
Issuance of common stock from the ATM Offering, Shares						1,815,000
Common Stock
Class Of Stock [Line Items]
Issuance of common stock from the ATM Offering, Shares								300,000
Gross proceeds from issuance of common stock								$ 600,000
Sales Agreement
Class Of Stock [Line Items]
Common stock price per share				$ 0.001
Common stock aggregate offering price	$ 23,000,000		$ 40,000,000	$ 20,000,000