BUSINESS AND SUMMARY OF ACCOUNTING POLICIES - Sale of real property (Details) - new - USD ($)	Jun. 18, 2019	Jun. 30, 2019	Dec. 31, 2018
Sale of real property
Land		$ 507,000	$ 1,281,000
Building and improvements		3,151,000	6,262,000
Accumulated depreciation		(18,240,000)	(20,380,000)
NET PROPERTY AND EQUIPMENT		$ 8,973,000	$ 9,775,000
Gain on sale of the Jupiter Facility	$ 7,817,000
Florida Pneumatic [Member]
Sale of real property
Purchase price	9,200,000
Selling Expense	451,000
Net proceeds	8,749,000
Land	774,000
Building and improvements	2,956,000
Accumulated depreciation	(2,798,000)
NET PROPERTY AND EQUIPMENT	932,000
Gain on sale of the Jupiter Facility	$ 7,817,000