BUSINESS AND SUMMARY OF ACCOUNTING POLICIES - Operating lease liabilities (Details) - USD ($)	Jun. 30, 2019	Jan. 01, 2019	Jun. 30, 2018
Lease Accounting
2019 (excluding the three months ended March 31, 2019)	$ 371,000
2020	581,000
2021	496,000
2022	459,000
2023	470,000
Thereafter	202,000
Total operating lease payments	2,579,000
Less imputed interest	(260,000)
Total operating lease liabilities	$ 2,319,000	$ 418,000	$ 0
Weighted-average remaining lease term	4 years 6 months
Weighted-average discount rate	5.00%