OPERATIONS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Jan. 01, 2019
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Operating lease right-of-use assets	$ 5,870
Total operating lease liabilities	$ 6,292
ASU 2016-02
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Operating lease right-of-use assets		$ 6,500
Total operating lease liabilities		$ 6,900