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NET LOSS PER SHARE - Potentially Dilutive Securities (Details) - shares	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Potentially dilutive securities	27,672,000	27,544,000
Common stock options
Common stock purchase warrants	6,291,000	4,538,000
Common stock purchase warrants
Common stock purchase warrants	21,381,000	22,979,000
Common stock warrants - liability treatment
Common stock purchase warrants	0	27,000

X

- Definition

Common stock warrants - equity treatment.

+ References

No definition available.

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- Definition

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

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