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INCOME TAXES (Details 1) - USD ($) | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Deferred tax liabilities: |  |
Property and equipment | $ (5,009,000) | $ (7,595,000)
Total deferred tax liabilities | (5,009,000) | (7,595,000)
Deferred tax assets: |  |
Net operating loss carryforwards | 1,421,000 | 2,783,000
Accruals and allowances | 157,000 | 193,000
Tax credits | 438,000 | 380,000
Other - net | 186,000 | 200,000
Capital loss carryover | 959,000 | 1,228,000
Total deferred tax assets | 3,161,000 | 4,784,000
Valuation allowance | (1,062,000) | (1,365,000)
Deferred tax assets net of valuation allowance | 2,099,000 | 3,419,000
Net deferred tax liabilities | $ (2,910,000) | $ (4,176,000)

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