INCOME TAXES (Details 1) - USD ($)	Dec. 31, 2015	Dec. 31, 2014
Deferred tax liabilities:
Property and equipment	$ (6,831,000)	$ (7,145,000)
Total deferred tax liabilities	(6,831,000)	(7,145,000)
Deferred tax assets:
Net operating loss carryforwards	2,859,000	3,424,000
Accruals and allowances	172,000	173,000
Tax credits	356,000	319,000
Other - net	163,000	235,000
Capital loss carryover	1,217,000	437,000
Total deferred tax assets	4,767,000	4,588,000
Valuation allowance	(1,340,000)	(549,000)
Deferred tax assets net of valuation allowance	3,427,000	4,039,000
Net deferred tax liabilities	$ (3,404,000)	$ (3,106,000)