ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Comprehensive Loss Data (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2019	Mar. 31, 2018
Selected Statement of Comprehensive Loss Data
Comprehensive Loss	$ (2,979)	$ (22,522)
Comprehensive Loss Attributable To Common Stockholders	(3,104)	$ (22,555)
As Previously Reported
Selected Statement of Comprehensive Loss Data
Comprehensive Loss	(6,538)
Comprehensive Loss Attributable To Common Stockholders	(6,663)
Adjustments
Selected Statement of Comprehensive Loss Data
Comprehensive Loss	3,559
Comprehensive Loss Attributable To Common Stockholders	$ 3,559

Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income. Excludes changes in equity resulting from investments by owners and distributions to owners.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 55
-Paragraph 4K
-URI http://asc.fasb.org/extlink&oid=84234705&loc=SL4591552-111686

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 1A
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=114867106&loc=SL7669619-108580

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 45
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 1B
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=114867106&loc=SL7669625-108580

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