NEW ACCOUNTING STANDARDS - Balance Sheet Reconciliation (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016	Oct. 01, 2016	Jan. 02, 2016
Accounting Policies [Abstract]
Cash and cash equivalents	$ 22,690	$ 35,409
Restricted cash	446	714
Total cash, cash equivalents and restricted cash shown in the Condensed Consolidated Statement of Cash Flows	$ 23,136	$ 36,123	$ 27,528	$ 40,071