FINANCING ARRANGEMENTS - Capital Leases (Details) - USD ($)	1 Months Ended	3 Months Ended	12 Months Ended
	Sep. 30, 2017	Sep. 30, 2017	Dec. 31, 2018	Dec. 31, 2017
Capital Leases
Total cost of the leased equipment			$ 1,624,000	$ 1,524,000
Current maturities of capital leases			337,000	295,000
Interest expense related to the leased assets			91,000	9,000
Depreciation expense related to the leased assets			201,000	0
Future minimum lease payments under non-cancelable capital leases
2019			398,000
2020			398,000
2021			398,000
2022			211,000
2023			2,000
Total noncancelable future lease commitments			1,407,000
Less interest			(119,000)
Present value obligations under capital leases			1,288,000
Five-year lease
Capital Leases
Capital lease, term of contract		5 years
Debt instrument, face amount	$ 1,096,000	$ 1,096,000
Effective interest rate	4.97%	4.97%
Property held under capital lease				1,103,000
Four year and six month lease
Capital Leases
Capital lease, term of contract	4 years 6 months
Debt instrument, face amount	$ 502,000	$ 502,000
Effective interest rate	6.22%	6.22%
Property held under capital lease				$ 421,000
Interest expense related to the leased assets			$ 0