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Percentage of outstanding common stock.

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Number of prefunded warrants issued during period.

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The amount of cash inflow arising from grant.

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Number of fractional shares issued during the period.

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Indicate number of shares or other units outstanding of each of registrant's classes of capital or common stock or other ownership interests, if and as stated on cover of related periodic report. Where multiple classes or units exist define each class/interest by adding class of stock items such as Common Class A [Member], Common Class B [Member] or Partnership Interest [Member] onto the Instrument [Domain] of the Entity Listings, Instrument.

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Exercise price per share or per unit of warrants or rights outstanding.

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Number of securities into which each warrant or right may be converted. For example, but not limited to, each warrant may be converted into two shares.

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No definition available.

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Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares.

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Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

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The number of shares issued in exchange for the original debt being converted in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or payments in the period.

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Date the declared dividend will be paid, in CCYY-MM-DD format.

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Date the dividend to be paid was declared, in CCYY-MM-DD format.

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Date the holder must own the stock to be entitled to the dividend, in CCYY-MM-DD format.

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The percentage rate used to calculate dividend payments on preferred stock.

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The cash inflow from the issuance of common stock, preferred stock, treasury stock, stock options, and other types of equity.

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Price of a single share of a number of saleable stocks of a company.

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No definition available.

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Number of new stock issued during the period.

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Ratio applied to the conversion of stock split, for example but not limited to, one share converted to two or two shares converted to one.

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Description of the reverse stock split arrangement. Also provide the retroactive effect given by the reverse split that occurs after the balance sheet date but before the release of financial statements.

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Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

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Period between issuance and expiration of outstanding warrant and right embodying unconditional obligation requiring redemption by transferring asset at specified or determinable date or upon event certain to occur, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Subsequent Events (Narrative) (Details) $ / shares in Units, £ in Millions										1 Months Ended	3 Months Ended	12 Months Ended
	May 01, 2020	Apr. 24, 2020 USD ($)	Apr. 24, 2020 USD ($) shares	Apr. 21, 2020 $ / shares shares	Apr. 19, 2020 GBP (£)	Apr. 19, 2020 USD ($)	Apr. 15, 2020	Apr. 14, 2020 shares	Mar. 11, 2020	Jul. 31, 2017	Mar. 31, 2020 $ / shares shares	Dec. 31, 2019 shares	May 11, 2020 shares
Subsequent Event [Line Items]
Entity Common Stock, Shares Outstanding													4,859,998
Common stock, shares outstanding											859,998	859,998
Co-Placement Agents and Securities Purchase Agreement [Member]
Subsequent Event [Line Items]
Percentage of outstanding common stock				9.99%
Subsequent Events [Member]
Subsequent Event [Line Items]
Stockholders' equity, reverse stock split								On April 14, 2020, the Company filed a certificate of amendment to its amended and restated certificate of incorporation with the Secretary of State of the State of Delaware to effect a 1-for-20 reverse stock split of the Company's shares of common stock.
Reverse stock split ratio								0.05
Fractional shares issued								0
Pre-funded warrants converted into shares			2,090,000
Net proceeds from equity financing \| $		$ 18,400,000	$ 18,400,000
Subsequent Events [Member] \| MTA [Member]
Subsequent Event [Line Items]
Grant from LifeAr					£ 2	$ 2,500,000
Subsequent Events [Member] \| Co-Placement Agents and Securities Purchase Agreement [Member]
Subsequent Event [Line Items]
Number of shares issued (in shares)				1,910,000
Combined offering price (in dollars per share) \| $ / shares				$ 5.00
Number of common shares				1
Warrants, exercise price per share \| $ / shares				$ 5.00
Warrant expiry term				5 years
Subsequent Events [Member] \| Co-Placement Agents and Securities Purchase Agreement [Member] \| Election of the Purchaser [Member]
Subsequent Event [Line Items]
Percentage of outstanding common stock				9.99%
Maximum [Member] \| Subsequent Events [Member] \| Co-Placement Agents and Securities Purchase Agreement [Member]
Subsequent Event [Line Items]
Pre-funded warrants to purchase common shares				2,090,000
Warrants to purchase shares				4,000,000
Warrant [Member]
Subsequent Event [Line Items]
Percentage of blocker provision											4.99%
Conversion percentage											9.99%
Warrants, exercise price per share \| $ / shares											$ 40.00
Warrant [Member] \| Subsequent Events [Member] \| Co-Placement Agents and Securities Purchase Agreement [Member]
Subsequent Event [Line Items]
Percentage of blocker provision				4.999%
Prefunded warrant exercise price \| $ / shares				$ 0.001
Warrant [Member] \| Minimum [Member] \| Subsequent Events [Member] \| Co-Placement Agents and Securities Purchase Agreement [Member] \| Beneficially Owning [Member]
Subsequent Event [Line Items]
Conversion percentage				4.99%
Series A Convertible Preferred Stock [Member]
Subsequent Event [Line Items]
Percentage of blocker provision										4.99%
Conversion percentage										9.99%
6% Convertible Exchangeable Preferred Stock [Member]
Subsequent Event [Line Items]
Dividend declared, date									Mar. 11, 2020
Dividend rate on convertible exchangeable preferred stock (in percent)											6.00%	6.00%
Combined offering price (in dollars per share) \| $ / shares											$ 59,220
6% Convertible Exchangeable Preferred Stock [Member] \| Subsequent Events [Member]
Subsequent Event [Line Items]
Dividends payable, date to be paid	May 01, 2020
Dividend, record date							Apr. 15, 2020