DESCRIPTION OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Offerings (Details) - USD ($) $ in Millions	1 Months Ended
Jul. 31, 2017	Apr. 30, 2017	Sep. 30, 2016	Aug. 31, 2016
Private Placement
Other Disclosures
Net proceeds from the sale of common stock	$ 1.9	$ 4.4	$ 0.8	$ 1.3

The cash inflow from the additional capital contribution to the entity.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Financing Activities
-URI http://asc.fasb.org/extlink&oid=6513228

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3255-108585

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Balance Type:	debit
Period Type:	duration