Liquidity and Management's Plans - Additional Information (Details) - USD ($)
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1 Months Ended |
2 Months Ended |
3 Months Ended |
6 Months Ended |
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Jul. 18, 2017 |
Jun. 30, 2017 |
Jun. 28, 2017 |
Jun. 30, 2017 |
May 31, 2017 |
Sep. 30, 2016 |
Jun. 30, 2016 |
May 31, 2016 |
Jun. 30, 2016 |
Jun. 30, 2017 |
Jun. 30, 2017 |
Jun. 30, 2016 |
Jul. 31, 2017 |
Conversion Of Stock [Line Items] |
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Net proceeds from sale of common stock |
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$ 3,426,050
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$ 0
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Proceeds from issuance of private placement net |
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$ 9,500,000
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$ 0
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$ 9,460,749
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May 2016 Warrant [Member] |
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Conversion Of Stock [Line Items] |
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Class of warrant or right, exercise price of warrants or rights |
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$ 1.3125
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$ 1.3125
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Warrant expiration period |
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5 years
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5 years
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Expiration date of warrants issued |
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May 18, 2021
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June 2016 Warrant [Member] |
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Conversion Of Stock [Line Items] |
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Class of warrant or right, exercise price of warrants or rights |
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$ 1.3125
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$ 1.3125
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$ 1.3125
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$ 1.3125
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$ 1.3125
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$ 1.3125
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$ 1.3125
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Warrant expiration period |
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5 years
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5 years
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Expiration date of warrants issued |
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May 18, 2021
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Private Placement [Member] |
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Conversion Of Stock [Line Items] |
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Class of warrant or right, number of securities called by warrants or rights |
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6,790,169
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6,790,169
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6,790,169
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Class of warrant or right, exercise price of warrants or rights |
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$ 1.14
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$ 1.14
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$ 1.14
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Proceeds from issuance of private placement net |
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$ 9,500,000
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Sale of stock, description of transaction |
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(i) one share of common stock and a detachable stock purchase warrant to purchase an additional 0.75 shares of common stock, or (ii) one share of non-voting convertible preferred stock and a detachable stock purchase warrant to purchase an additional 0.75 shares of common stock, at a price of $1.14 per unit.
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July 2017 Public Offering [Member] |
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Conversion Of Stock [Line Items] |
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Sale of stock, description of transaction |
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Each unit included one share of common stock and one common warrant to purchase one share of common stock at an exercise price of $0.425 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 one share of common stock at an exercise price of $0.425 per share.
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Second Amended and Restated MGHIF Financing Agreement [Member] |
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Conversion Of Stock [Line Items] |
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Interest rate |
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10.00%
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Maturity date |
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Jul. 14, 2017
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Debt instrument, extended maturity date |
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Jul. 14, 2018
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Percentage of warrants to purchase common stock shares on outstanding pricnipal and accrued interest on issuance date |
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20.00%
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Common Stock [Member] |
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Conversion Of Stock [Line Items] |
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Conversion of stock, shares issued |
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2,309,428
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Common Stock [Member] | Private Placement [Member] |
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Conversion Of Stock [Line Items] |
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Stock issued during period, shares, new issues |
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6,744,127
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Non-voting Convertible Preferred Stock [Member] |
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Conversion Of Stock [Line Items] |
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Conversion of stock, shares converted |
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2,309,428
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Non-voting Convertible Preferred Stock [Member] | Private Placement [Member] |
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Conversion Of Stock [Line Items] |
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Stock issued during period, shares, new issues |
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2,309,428
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Bridge Financing Notes [Member] |
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Conversion Of Stock [Line Items] |
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Remaining capacity available under financing |
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$ 1,000,000
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$ 1,000,000
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$ 1,000,000
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$ 1,000,000
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Subsequent Event [Member] | July 2017 Public Offering [Member] |
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Conversion Of Stock [Line Items] |
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Class of warrant or right, exercise price of warrants or rights |
$ 0.425
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Stock issued during period, shares, new issues |
18,164,195
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Net proceeds from sale of common stock and warrants |
$ 8,700,000
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Note Purchase Agreement [Member] | Bridge Financing Notes [Member] |
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Conversion Of Stock [Line Items] |
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Interest rate |
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10.00%
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Maturity date |
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Sep. 30, 2017
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Remaining capacity available under financing |
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1,000,000
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1,000,000
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1,000,000
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$ 1,000,000
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Note Purchase Agreement [Member] | Bridge Financing Notes [Member] | Maximum [Member] |
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Conversion Of Stock [Line Items] |
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Aggregate principal amount |
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$ 1,500,000
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Note Purchase Agreement [Member] | Bridge Financing Note One [Member] |
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Conversion Of Stock [Line Items] |
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Aggregate principal amount |
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500,000
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Note Purchase Agreement [Member] | Bridge Financing Note Two [Member] |
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Conversion Of Stock [Line Items] |
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Aggregate principal amount |
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500,000
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Note Purchase Agreement [Member] | Bridge Financing Note Three [Member] |
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Conversion Of Stock [Line Items] |
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Aggregate principal amount |
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500,000
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Note Purchase Agreement [Member] | Qualified Financing [Member] | Minimum [Member] |
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Conversion Of Stock [Line Items] |
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Net proceeds from equity or debt financing |
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$ 5,000,000
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Note Purchase Agreement [Member] | Subsequent Event [Member] | Bridge Financing Notes [Member] | Stock Purchase Warrants [Member] |
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Conversion Of Stock [Line Items] |
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Class of warrant or right, number of securities called by warrants or rights |
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140,845
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Class of warrant or right, exercise price of warrants or rights |
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$ 0.78
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Note Purchase Agreement [Member] | Subsequent Event [Member] | Bridge Financing Notes [Member] | Warrants [Member] |
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Conversion Of Stock [Line Items] |
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Class of warrant or right, number of securities called by warrants or rights |
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158,730
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Class of warrant or right, exercise price of warrants or rights |
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$ 0.69
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Delaware Limited Liability Company [Member] | Note Purchase Agreement [Member] | Bridge Financing Notes [Member] |
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Conversion Of Stock [Line Items] |
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Interest rate |
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10.00%
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Maturity date |
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Sep. 30, 2017
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Remaining capacity available under financing |
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1,000,000
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$ 1,000,000
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1,000,000
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$ 1,000,000
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Delaware Limited Liability Company [Member] | Note Purchase Agreement [Member] | Bridge Financing Notes [Member] | Maximum [Member] |
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Conversion Of Stock [Line Items] |
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Aggregate principal amount |
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$ 1,500,000
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Delaware Limited Liability Company [Member] | Note Purchase Agreement [Member] | Bridge Financing Note One [Member] |
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Conversion Of Stock [Line Items] |
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Aggregate principal amount |
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500,000
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Delaware Limited Liability Company [Member] | Note Purchase Agreement [Member] | Bridge Financing Note Two [Member] |
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Conversion Of Stock [Line Items] |
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Aggregate principal amount |
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500,000
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Delaware Limited Liability Company [Member] | Note Purchase Agreement [Member] | Bridge Financing Note Three [Member] |
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Conversion Of Stock [Line Items] |
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Aggregate principal amount |
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$ 500,000
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Delaware Limited Liability Company [Member] | Note Purchase Agreement [Member] | Qualified Financing [Member] | Minimum [Member] |
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Conversion Of Stock [Line Items] |
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Net proceeds from equity or debt financing |
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5,000,000
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Delaware Limited Liability Company [Member] | Note Purchase Agreement [Member] | Subsequent Event [Member] | Bridge Financing Notes [Member] | Stock Purchase Warrants [Member] |
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Conversion Of Stock [Line Items] |
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Class of warrant or right, number of securities called by warrants or rights |
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140,845
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Class of warrant or right, exercise price of warrants or rights |
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$ 0.78
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Delaware Limited Liability Company [Member] | Note Purchase Agreement [Member] | Subsequent Event [Member] | Bridge Financing Notes [Member] | Warrants [Member] |
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Conversion Of Stock [Line Items] |
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Class of warrant or right, number of securities called by warrants or rights |
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158,730
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Class of warrant or right, exercise price of warrants or rights |
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$ 0.69
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Cowen and Company, LLC [Member] | Sales Agreement [Member] | At the Market Offering [Member] |
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Conversion Of Stock [Line Items] |
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Stock issued during period, value, new issues |
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$ 11,500,000
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Maximum commission percentage on gross proceeds |
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3.00%
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Net proceeds from sale of common stock |
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7,800,000
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1,300,000
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3,400,000
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Gross proceeds from sale of common stock |
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8,400,000
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$ 1,400,000
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$ 3,600,000
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Remaining availability under at the market offering |
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$ 3,100,000
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$ 3,100,000
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Cowen and Company, LLC [Member] | Sales Agreement [Member] | Maximum [Member] | At the Market Offering [Member] |
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Conversion Of Stock [Line Items] |
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Aggregate gross proceeds from issuance of common stock |
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$ 25,000,000
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Cowen and Company, LLC [Member] | Sales Agreement [Member] | Common Stock [Member] | At the Market Offering [Member] |
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Conversion Of Stock [Line Items] |
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Stock issued during period, shares, new issues |
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7,700,000
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2,000,000
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4,000,000
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