SIGNIFICANT ACCOUNTING POLICIES (Details)	9 Months Ended	12 Months Ended
	Sep. 30, 2015 USD ($)	Dec. 31, 2016 USD ($) segment	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)
Cash and Cash Equivalents [Line Items]
Deferred revenue		$ 7,975,000	$ 3,903,000
Impairment of long-lived assets		0	0
Impairment of goodwill		$ 0	0
Number of reportable segments | segment		1
Deferred loan issuance costs, net		$ 20,856,000	521,000	$ 804,000
Net cash provided by (used in) operating activities		19,848,000	(3,224,000)
Net cash provided by financing activities		$ 21,842,000	2,286,000
Adjustments for New Accounting Pronouncement | New Accounting Pronouncement, Early Adoption, Effect
Cash and Cash Equivalents [Line Items]
Net cash provided by (used in) operating activities	$ 41,000
Net cash provided by financing activities	$ 41,000
Adjustments for New Accounting Pronouncement | Deferred Loans Issuance Costs
Cash and Cash Equivalents [Line Items]
Deferred loan issuance costs, net			(4,370,000)
Adjustments for New Accounting Pronouncement | Senior Secured Notes
Cash and Cash Equivalents [Line Items]
Deferred loan issuance costs, net			$ 4,370,000
Customer relationships
Cash and Cash Equivalents [Line Items]
Estimate useful life of intangible assets (in years)		13 years	13 years
Foreign Countries
Cash and Cash Equivalents [Line Items]
Cash in subsidiaries		$ 5,960,000	$ 3,275,000
Foreign Countries | Trade Accounts Receivable
Cash and Cash Equivalents [Line Items]
Concentration risk, percentage		19.00%	26.00%