Liquidity and Management's Plans - Additional Information (Details) - USD ($)										1 Months Ended		3 Months Ended	6 Months Ended	9 Months Ended		25 Months Ended
	Oct. 22, 2018	Jul. 30, 2018	Jul. 14, 2018	Jun. 11, 2018	Apr. 19, 2018	Feb. 06, 2018	Jul. 18, 2017	May 31, 2017	Sep. 13, 2016	Jul. 31, 2017	Jul. 31, 2015	Sep. 30, 2018	Jun. 30, 2018	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Jun. 30, 2017
Conversion Of Stock [Line Items]
Proceeds from issuance of common stock, net of issuance costs														$ 597,743	$ 3,426,050
Net proceeds from sale of common stock and warrants														10,728,132	$ 8,754,882
Bridge Financing Notes [Member] | Note Purchase Agreement [Member]
Conversion Of Stock [Line Items]
Interest rate								10.00%
Maturity date								Sep. 30, 2017
Bridge Financing Notes [Member] | Note Purchase Agreement [Member] | Maximum [Member]
Conversion Of Stock [Line Items]
Aggregate principal amount								$ 1,500,000
Bridge Financing Note One [Member] | Note Purchase Agreement [Member]
Conversion Of Stock [Line Items]
Aggregate principal amount								500,000
Bridge Financing Note Two [Member] | Note Purchase Agreement [Member]
Conversion Of Stock [Line Items]
Aggregate principal amount								500,000
Bridge Financing Note Three [Member] | Note Purchase Agreement [Member]
Conversion Of Stock [Line Items]
Aggregate principal amount								$ 500,000
Qualified Financing [Member] | Note Purchase Agreement [Member] | Minimum [Member]
Conversion Of Stock [Line Items]
Net proceeds from equity or debt financing														$ 5,000,000
MGHIF Financing Agreement [Member]
Conversion Of Stock [Line Items]
Stock issued during period, shares, new issues											45,454
Shares issued, price per share											$ 110.00
Proceeds from issuance of common stock, net of issuance costs											$ 5,000,000
Aggregate principal amount											$ 1,000,000
Interest rate											8.00%
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
Stock Purchase Warrants [Member] | Bridge Financing Notes [Member] | Note Purchase Agreement [Member]
Conversion Of Stock [Line Items]
Class of warrant or right, exercise price of warrants or rights																	$ 19.50
Class of warrant or right, number of securities called by warrants or rights																	5,634
Warrants [Member] | Bridge Financing Notes [Member] | Note Purchase Agreement [Member]
Conversion Of Stock [Line Items]
Class of warrant or right, exercise price of warrants or rights										$ 17.25
Class of warrant or right, number of securities called by warrants or rights										6,350
October 2018 Public Offering [Member] | Common Stock [Member] | Subsequent Event [Member]
Conversion Of Stock [Line Items]
Stock issued during period, shares, new issues	2,220,000
Shares issued, price per share	$ 1.45
Gross proceeds from sale of common stock	$ 3,200,000
Proceeds from issuance of common stock, net of issuance costs	$ 2,800,000
Underwriters Overallotments [Member] | Common Stock [Member] | Subsequent Event [Member]
Conversion Of Stock [Line Items]
Period option granted to the underwriters to acquire an additional shares to cover overallotments	45 days
Stock issued during period, shares, new issues	330,751
Private Placement [Member] | Common Stock [Member] | MGHIF Financing Agreement [Member] | The Allonge [Member]
Conversion Of Stock [Line Items]
Stock issued during period, shares, new issues		144,238
Accrued and unpaid interest		$ 285,512
Accrued and unpaid interest due date		Jul. 14, 2018
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 share of common stock and one common warrant to purchase 0.5 share of common stock at an exercise price of $3.25 per share. Each pre-funded unit included one pre-funded warrant to purchase one share of common stock for an exercise price of $0.01 per share, and one common warrant to purchase 0.5 share of common stock at an exercise price of $3.25 per share.	Each unit included one share of common stock and one common warrant to purchase 0.5 share of common stock at an exercise price of $3.25 per share. Each pre-funded unit included one pre-funded warrant to purchase one share of common stock for an exercise price of $0.01 per share, and one common warrant to purchase 0.5 share of common stock at an exercise price of $3.25 per share.
Class of warrant or right, number of securities called by each warrant or right						0.5
Class of warrant or right, exercise price of warrants or rights						$ 3.25
Warrants exercisable period						5 years
February 2018 Public Offering [Member] | Pre-funded Units [Member]
Conversion Of Stock [Line Items]
Stock issued during period, shares, new issues						851,155
Shares issued, price per share						$ 3.24
February 2018 Public Offering [Member] | Pre-funded Warrants [Member]
Conversion Of Stock [Line Items]
Class of warrant or right, exercise price of warrants or rights						$ 0.01
Warrants exercised					851,155									851,155
July 2017 Public Offering [Member]
Conversion Of Stock [Line Items]
Stock issued during period, shares, new issues							18,164,195
Shares issued, price per share							$ 0.40
Gross proceeds from sale of common stock and warrants							$ 10,000,000
Net proceeds from sale of common stock and warrants							$ 8,800,000
Sale of stock, description of transaction														Each unit included one twenty-fifth of a share of common stock and one common warrant to purchase one twenty-fifth of a share of common stock at an exercise price of $10.63 per share. Each pre-funded unit included one pre-funded warrant to purchase one twenty-fifth of a share of common stock for an exercise price of $0.25 per share, and one common warrant to purchase one twenty-fifth of a share of common stock at an exercise price of $10.63 per share.
Class of warrant or right, number of securities called by each warrant or right							0.04
Class of warrant or right, exercise price of warrants or rights							$ 10.63
Warrants exercisable period							5 years
July 2017 Public Offering [Member] | Bridge Financing Notes [Member]
Conversion Of Stock [Line Items]
Repayment of outstanding debt							$ 1,000,000			$ 1,000,000
July 2017 Public Offering [Member] | Pre-funded Units [Member]
Conversion Of Stock [Line Items]
Stock issued during period, shares, new issues							6,835,805
Shares issued, price per share							$ 0.39
July 2017 Public Offering [Member] | Pre-funded Warrants [Member]
Conversion Of Stock [Line Items]
Class of warrant or right, number of securities called by each warrant or right							0.04
Class of warrant or right, exercise price of warrants or rights							$ 0.25
At the Market Offering [Member] | Sales Agreement [Member] | Cowen and Company, LLC [Member]
Conversion Of Stock [Line Items]
Gross proceeds from sale of common stock												$ 400,000		$ 600,000
Proceeds from issuance of common stock, net of issuance costs												$ 400,000		600,000
Aggregate gross proceeds from issuance of common stock														9,400,000		$ 9,400,000
Stock issued during period, value, new issues									$ 11,500,000
Aggregate net proceeds from sale of common stock														$ 8,800,000		$ 8,800,000
At the Market Offering [Member] | Sales Agreement [Member] | Maximum [Member] | Cowen and Company, LLC [Member]
Conversion Of Stock [Line Items]
Aggregate gross proceeds from issuance of common stock									$ 25,000,000
At the Market Offering [Member] | Common Stock [Member] | Sales Agreement [Member] | Cowen and Company, LLC [Member]
Conversion Of Stock [Line Items]
Stock issued during period, shares, new issues												214,193		318,236		690,247