ORGANIZATION AND BASIS OF PRESENTATION (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2017 USD ($) segment	Jan. 01, 2017 USD ($)	Dec. 31, 2016 USD ($)
Summary of significant accounting policies
Number of reporting segments | segment	2
Cumulative effect of an accounting change		$ 0
Estimated revenue to be deferred over future periods, percent (less than)	3.00%
Accumulated other comprehensive loss	$ (1,533)		$ (1,745)
Operating lease, right-of-use, estimated asset and liability (less than)	25,000
Restricted cash	4,200		4,127
Lenders One
Summary of significant accounting policies
Total assets	4,600		3,800
Total liabilities	$ 2,000		$ 1,500
Accounting Standards Update 2016-09 | Additional paid-in capital
Summary of significant accounting policies
Cumulative effect of an accounting change		932
Accounting Standards Update 2016-09 | Retained earnings
Summary of significant accounting policies
Cumulative effect of an accounting change		$ (932)