BUSINESS AND SUMMARY OF ACCOUNTING POLICIES - Maturity analysis of the annual undiscounted cash flows (Details)	Jun. 30, 2020 USD ($)
Operating lease liabilities
2020 (excluding the three months ended March 31, 2020)	$ 432,000
2021	859,000
2022	769,000
2023	657,000
2024	388,000
Thereafter	1,049,000
Total operating lease payments	4,154,000
Less imputed interest	(490,000)
Total operating lease liabilities	$ 3,664,000
Weighted-average remaining lease term	6 years 3 months 18 days
Weighted-average discount rate	4.30%