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SIGNIFICANT AGREEMENTS AND CONTRACTS (Details) - Subaward Agreement - CD201 product candidate - USD ($) $ in Thousands		3 Months Ended
	Mar. 30, 2017	Mar. 31, 2018
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Qualifying development expenses to be reimbursed by CARB-X upon acceptance of new initial drug application	$ 3,900
Qualifying development expenses to be reimbursed through a Phase 1 clinical trial of CD201	$ 3,000
Reduction in research and development expense		$ 3
Billed accounts receivable		100
Unbilled accounts receivable		$ 200
Agreement termination, written notice period	30 days

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.3(c))
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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.3(c)(3))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 912
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-Section 45
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