Stockholders Deficit - Additional Information (Details) - USD ($)					1 Months Ended			3 Months Ended			6 Months Ended	9 Months Ended		12 Months Ended
	Nov. 30, 2019	Jan. 29, 2018	Jun. 30, 2017	Apr. 30, 2017	Sep. 30, 2019	Mar. 31, 2019	Jan. 31, 2018	Sep. 30, 2019	Sep. 30, 2018	Jun. 30, 2018	Jun. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Class Of Stock [Line Items]
Issuance of common stock from the ATM Offering, Shares										5,733,314	5,733,314
Gross proceeds from issuance of common stock										$ 21,100,000	$ 21,100,000
Sales commission										600,000	600,000
Other offering expenses paid										200,000	200,000
Net proceeds from issuance of common stock from the ATM Offering										$ 20,200,000	$ 20,200,000
Stock-based compensation								$ 316,555	$ 257,975			$ 845,133	$ 1,643,353
Selling, General and Administrative
Class Of Stock [Line Items]
Stock-based compensation								226,645	$ 200,317			$ 625,821	1,475,975
Employee Stock Option
Class Of Stock [Line Items]
Stock option granted												1,227,500
Restricted Stock Units R S U
Class Of Stock [Line Items]
Unrecognized compensation expense					$ 628,172			$ 628,172				$ 628,172
Compensation expense period expected to be recognized												2 years 5 months 19 days
Vested and unissued RSU awards, description												Vested and unissued awards at September 30, 2019 represents RSU awards granted on August 16, 2018 for which the vesting date was September 30, 2019, but for which issuance of the awards occurred on the next business day, October 1, 2019.
Vested and unissued RSU awards granted date												Aug. 16, 2018
Vested and unissued RSU awards vesting date												Sep. 30, 2019
Vested and unissued RSU awards issuance date												Oct. 01, 2019
Issuance of shares granted												77,500
Restricted stock grant date fair value												$ 1.93
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
Inducement Awards | Employee Stock Option
Class Of Stock [Line Items]
Stock option granted								35,000				80,000
Two Thousand Fourteen Equity Incentive Plan | Employee Stock Option
Class Of Stock [Line Items]
Unrecognized compensation expense					$ 2,137,036			$ 2,137,036				$ 2,137,036
Compensation expense period expected to be recognized												2 years 6 months 10 days
Pre-funded Warrants
Class Of Stock [Line Items]
Exercise price of warrants					$ 0.01			$ 0.01				$ 0.01
Underwritten Public Offering
Class Of Stock [Line Items]
Common stock price per share					$ 0.65		$ 2.90	0.65				0.65
Issuance of common stock from the ATM Offering, Shares					29,298,537		13,915,000
Net proceeds from initial public offering after underwriters' discounts, commissions and offering expenses					$ 17,700,000									$ 37,700,000
Over-Allotment Option
Class Of Stock [Line Items]
Common stock price per share					$ 0.611			0.611				0.611
Issuance of common stock from the ATM Offering, Shares					3,821,548		1,815,000
Private Placement
Class Of Stock [Line Items]
Resale of warrants, registration statement to file, period following date of closing					30 days
Warrants to obtain effectiveness of registration statement period following closing date					90 days
Private Placement | Institutional Accredited Investors
Class Of Stock [Line Items]
Exercise price of warrants					$ 0.65			$ 0.65				$ 0.65
Private Placement | Institutional Accredited Investors | Pre-funded Warrants
Class Of Stock [Line Items]
Issuance of warrants, shares					5,411,687			5,411,687				5,411,687
Number of securities called by warrants					5,411,687			5,411,687				5,411,687
Exercise price of warrants					$ 0.64			$ 0.64				$ 0.64
Exercise price of warrants, exercisable subject to beneficial ownership limitations					$ 0.01			$ 0.01				$ 0.01
Private Placement | Cantor Fitzgerald & Co. | Pre-funded Warrants
Class Of Stock [Line Items]
Agent cash fee, percentage of gross proceeds from sale of warrants					6.00%
Net proceeds from sale of warrants					$ 3,100,000
Common Stock
Class Of Stock [Line Items]
Issuance of common stock from the ATM Offering, Shares										261,352	261,352
Gross proceeds from issuance of common stock										$ 600,000	$ 600,000
Sales Agreement
Class Of Stock [Line Items]
Common stock price per share				$ 0.001
Common stock aggregate offering price			$ 40,000,000	$ 20,000,000			$ 23,000,000
Cowen ATM Offering
Class Of Stock [Line Items]
Common stock aggregate offering price						$ 40,000,000
Issuance of common stock from the ATM Offering, Shares												0
Deferred offering costs					$ 100,000	$ 200,000		$ 100,000				$ 100,000
Sales agreement termination, month and year												2019-11
Deferred offering costs written off												$ 100,000
Cowen ATM Offering | Scenario, Forecast
Class Of Stock [Line Items]
Issuance of common stock from the ATM Offering, Shares	0