Liquidity and Management's Plans - Additional Information (Details) - USD ($)									1 Months Ended	3 Months Ended		9 Months Ended		12 Months Ended
		Mar. 29, 2019	Oct. 22, 2018	Jul. 30, 2018	Jul. 14, 2018	Jun. 11, 2018	Feb. 06, 2018	Sep. 13, 2016	Jul. 31, 2015	Sep. 30, 2018	Jun. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Conversion Of Stock [Line Items]
Proceeds from issuance of common stock, net of issuance costs												$ 4,782,509	$ 597,743
Net proceeds from sale of common stock and warrants												$ 0	$ 10,728,132
MGHIF Financing Agreement [Member]
Conversion Of Stock [Line Items]
Stock issued during period, shares, new issues									2,273
Shares issued, price per share									$ 2,200
Proceeds from issuance of common stock, net of issuance costs									$ 5,000,000
Aggregate principal amount									$ 1,000,000
MGHIF Financing Agreement [Member] | The Allonge [Member]
Conversion Of Stock [Line Items]
Aggregate principal amount						$ 1,000,000
Accrued and unpaid interest					$ 285,512
Revised and extended maturity date for payment, terms						Six semi-annual payments
Principal payments includes accrued and unpaid interest						$ 166,667
Beginning date of debt maturity						Jan. 02, 2019
Ending date of debt maturity						Jul. 01, 2021
February 2018 Public Offering [Member]
Conversion Of Stock [Line Items]
Stock issued during period, shares, new issues							2,841,152
Shares issued, price per share							$ 3.25
Gross proceeds from sale of common stock and warrants							$ 12,000,000
Net proceeds from sale of common stock and warrants							$ 10,700,000
Sale of stock, description of transaction												Each unit included one twentieth of a share of common stock and one common warrant to purchase one fortieth of a share of common stock at an exercise price of $65.00 per share. Each pre-funded unit included one pre-funded warrant to purchase one twentieth of a share of common stock for an exercise price of $0.20 per share, and one common warrant to purchase one fortieth of a share of common stock at an exercise price of $65.00 per share.
Class of warrant or right, exercise price of warrants or rights							$ 65.00
Warrants exercisable period							5 years
At the Market Offering [Member]
Conversion Of Stock [Line Items]
Stock issued during period, value, new issues										$ 405,423	$ 192,320
At the Market Offering [Member] | Cowen and Company, LLC [Member] | Sales Agreement [Member]
Conversion Of Stock [Line Items]
Gross proceeds from sale of common stock														$ 600,000
Proceeds from issuance of common stock, net of issuance costs														$ 600,000
Stock issued during period, value, new issues								$ 11,500,000
At the Market Offering [Member] | Cowen and Company, LLC [Member] | Sales Agreement [Member] | Maximum [Member]
Conversion Of Stock [Line Items]
Aggregate gross proceeds from issuance of common stock								$ 25,000,000
Common Stock [Member] | October 2018 Public Offering [Member]
Conversion Of Stock [Line Items]
Stock issued during period, shares, new issues			111,000
Shares issued, price per share			$ 29.00
Gross proceeds from sale of common stock			$ 3,200,000
Proceeds from issuance of common stock, net of issuance costs			$ 2,800,000
Common Stock [Member] | March 2019 Public Offering [Member]
Conversion Of Stock [Line Items]
Stock issued during period, shares, new issues		450,000
Shares issued, price per share		$ 12.00
Gross proceeds from sale of common stock		$ 5,400,000
Proceeds from issuance of common stock, net of issuance costs		$ 4,800,000
Common Stock [Member] | Private Placement [Member] | MGHIF Financing Agreement [Member] | The Allonge [Member]
Conversion Of Stock [Line Items]
Stock issued during period, shares, new issues				7,212
Accrued and unpaid interest				$ 285,512
Accrued and unpaid interest due date				Jul. 14, 2018
Common Stock [Member] | At the Market Offering [Member]
Conversion Of Stock [Line Items]
Stock issued during period, shares, new issues	[1]									10,710	5,202
Stock issued during period, value, new issues	[1]									$ 107	$ 52
Common Stock [Member] | At the Market Offering [Member] | Cowen and Company, LLC [Member] | Sales Agreement [Member]
Conversion Of Stock [Line Items]
Stock issued during period, shares, new issues														15,912
Pre-funded Units [Member] | February 2018 Public Offering [Member]
Conversion Of Stock [Line Items]
Stock issued during period, shares, new issues							851,155
Shares issued, price per share							$ 3.24
Pre-funded Warrants [Member] | February 2018 Public Offering [Member]
Conversion Of Stock [Line Items]
Class of warrant or right, exercise price of warrants or rights							$ 0.20
Warrants exercised														851,155

[1] Reflects the 1-for-20 reverse stock split that became effective on August 29, 2019. Refer to Note 8 – Stockholders’ equity for further information.