Annual report pursuant to Section 13 and 15(d)

INCOME TAXES (Details)

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INCOME TAXES (Details) - USD ($)
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Income Tax Expense (Benefit), Continuing Operations [Abstract]      
Current federal benefit $ 0 $ (74,000) $ (1,202,000)
Current state expense 91,000 31,000 282,000
Deferred federal benefit (3,564,000) (813,000) (5,389,000)
Deferred state expense (benefit) (93,000) 210,000 81,000
Zakat and income tax expense (benefit) (3,566,000) (646,000) (6,228,000)
Effective Income Tax Rate Reconciliation, Amount [Abstract]      
Income taxes at U.S. statutory rate (3,455,000) (661,000) 4,816,000
State taxes, net of federal benefit 256,000 234,000 235,000
Net operating loss carryback 0 0 (961,000)
Research and development credits (203,000) (263,000) 0
Permanent and other items (164,000) 44,000 (11,000)
Deferred tax impact of US tax reform 0 0 (10,307,000)
Zakat and income tax expense (benefit) (3,566,000) (646,000) $ (6,228,000)
Deferred tax liabilities:      
Plant, pipeline and equipment (29,227,000) (25,169,000)  
Intangible assets 0 (1,075,000)  
Other assets (32,000) (40,000)  
Operating lease asset (2,838,000)    
Investment in AMAK (302,000) (671,000)  
Total deferred tax liabilities (32,399,000) (26,955,000)  
Deferred tax assets:      
Net operating loss carryforward 11,685,000 9,073,000  
Intangible assets 3,699,000 0  
Operating lease liability 2,838,000    
Stock-based compensation 1,093,000 954,000  
Foreign tax credit 891,000 802,000  
Accounts receivable 240,000 238,000  
Mineral interests 226,000 226,000  
Interest expense carryforward 211,000 0  
General business credit 140,000 0  
Inventory 111,000 133,000  
Post-retirement benefits 71,000 79,000  
Charitable contributions 45,000 0  
Gross deferred tax assets 21,250,000 11,505,000  
Valuation allowance (226,000) (226,000)  
Total net deferred tax assets 21,024,000 11,279,000  
Net deferred tax liabilities (11,375,000) (15,676,000)  
Net operating loss carryforwards 56,600,000 43,200,000  
Interest or penalties related to uncertain tax positions $ 0 $ 0