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STOCKHOLDERS' EQUITY - WARRANTS (Details) - USD ($)		1 Months Ended
	Mar. 31, 2015	Dec. 31, 2014	Dec. 31, 2015
Warrants
Exercise Price (in dollars per share)	$ 3.75
Class of Warrant or Right, Outstanding			537,893
Number of warrants exercised (in shares)	235,000
Proceeds from Warrant Exercises	$ 881,000
CIRM
Warrants
Number of warrants net exercised		461,382
Issuance of common stock upon net exercise of warrants (in shares)		168,039
CIRM | Warrants issued in August 2011
Warrants
Exercise Price (in dollars per share)			$ 3.98
Class of Warrant or Right, Outstanding			537,893

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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(i)(4))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(i))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

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