The amount for notes payable (written promise to pay), due to related parties. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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.(k)(1))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 850
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(a)(5))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Name:	us-gaap_NotesPayableRelatedPartiesClassifiedCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

RELATED PARTY TRANSACTIONS - LONG-TERM DEBT (Details) - IAC - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Oct. 14, 2016	Aug. 29, 2013
Related Party Transaction [Line Items]
Total long-term debt—related party	$ 2,813	$ 49,838
Less: Current portion of long-term debt—related party	816	2,838
Total long-term debt—related party, net	1,997	47,000
Other
Related Party Transaction [Line Items]
Total long-term debt—related party	2,813	2,838
Promissory note due October 14, 2023 \| Notes Payable
Related Party Transaction [Line Items]
Total long-term debt—related party	0	42,000	$ 42,000
Promissory note due August 29, 2018 \| Notes Payable
Related Party Transaction [Line Items]
Total long-term debt—related party	$ 0	$ 5,000		$ 5,000