Cash, cash equivalents, restricted cash and marketable securities.

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- Definition

Nature of operations and liquidity.

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- Definition

Amount of cash inflow (outflow) from operating activities, including discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities.

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- Definition

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

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- Definition

The cumulative amount of the reporting entity's undistributed earnings or deficit.

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- Definition

Per share amount received by subsidiary or equity investee for each share of common stock issued or sold in the stock transaction.

+ References

No definition available.

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Number of new stock issued during the period.

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NATURE OF OPERATIONS AND LIQUIDITY - Additional Information (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Nature Of Operations And Liquidity [Line Items]
Accumulated deficit	$ 277,470,620		$ 277,470,620		$ 286,736,218
Net cash used in operating activities			26,663,142	$ 29,251,354
Cash, cash equivalents, restricted cash and marketable securities	$ 32,600,000		$ 32,600,000
Common Stock
Nature Of Operations And Liquidity [Line Items]
Common stock issued and sold	2,019,652	1,361,956
Common Stock \| Sales Agreement
Nature Of Operations And Liquidity [Line Items]
Common stock issued and sold			3,381,608
Common stock, average price per share	$ 3.7113		$ 3.7113
Net proceeds after deducting sales commissions and offering costs payable			$ 12,100,000