INCOME TAXES - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Deferred tax assets:
Alternative minimum tax credits	$ 69,000	$ 137,000
Accrued bonus and stock based compensation	386,000	358,000
Basis of intangible assets	1,687,000	1,368,000
Bad debt reserve	85,000	175,000
Contribution carryover	38,000	26,000
Interest expense carryforward	487,000	190,000
Net operating loss carry forwards	13,682,000	12,500,000
Less valuation allowance	(13,453,000)	(12,109,000)
Total deferred tax assets	2,981,000	2,645,000
Deferred tax liabilities:
Basis of fixed assets	(2,788,000)	(2,444,000)
Contingent liability	0	3,000
Partnership income	(124,000)	(67,000)
Total deferred tax liabilities	(2,912,000)	(2,508,000)
Net deferred tax assets	$ 69,000	$ 137,000