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SELECTED QUARTERLY FINANCIAL INFORMATION (UNAUDITED) (Details) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Revenues	$ 191,000	$ 163,000	$ 174,000	$ 537,000	$ 94,000	$ 5,108,000	$ 211,000	$ 749,000	$ 1,065,000	$ 6,162,000	$ 36,371,000
Operating expenses	7,977,000	7,407,000	6,905,000	8,031,000	8,875,000	8,985,000	9,122,000	9,826,000	30,320,000	36,808,000	36,930,000
Net loss	$ (7,429,000)	$ (6,899,000)	$ (6,405,000)	$ (7,183,000)	$ (8,482,000)	$ (3,576,000)	$ (8,637,000)	$ (8,842,000)	(27,916,000)	(29,537,000)	46,000
Basic and diluted net loss per share	$ (0.05)	$ (0.04)	$ (0.04)	$ (0.05)	$ (0.05)	$ (0.02)	$ (0.05)	$ (0.06)
License fees and royalties									$ 1,065,000	$ 6,162,000	$ 1,371,000
Janssen Pharmaceuticals Inc | License agreements
License fees and royalties						$ 5,000,000

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- Definition

Revenue earned during the period relating to consideration received from another party for the right to use, but not own, certain of the entity's intangible assets. Licensing arrangements include, but are not limited to, rights to use a patent, copyright, technology, manufacturing process, software or trademark. Licensing fees are generally, but not always, fixed as to amount and not dependent upon the revenue generated by the licensing party. An entity may receive licensing fees for licenses that also generate royalty payments to the entity. Royalty revenue is derived from a percentage or stated amount of sales proceeds or revenue generated by the third party using the entity's property. Examples of property from which royalties may be derived include patents and oil and mineral rights.

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The amount of net income or loss for the period per each share in instances when basic and diluted earnings per share are the same amount and reported as a single line item on the face of the financial statements. Basic earnings per share is the amount of net income or loss for the period per each share of common stock or unit outstanding during the reporting period. Diluted earnings per share includes the amount of net income or loss for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
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-Section S99
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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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