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11. INCOME TAXES (Details - Effective rate) | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Effective income tax rate reconciliation |  |  |
Statutory rate | 35.00% | 35.00% | 35.00%
State income taxes, net of federal benefit | 9.20% | 10.00% | (8.20%)
Change in valuation allowance | (4.20%) | (11.50%) | 458.00%
Fair value adjustments and warrant inducements | 2.00% | 31.80% | 0.00%
Domestic production gross receipts deduction | (2.90%) | (2.00%) | 0.00%
Section 382 reduction to loss carryover | 0.10% | (24.20%) | (141.10%)
Stock compensation | (0.80%) |  | (20.90%)
Non-deductible items | (0.50%) | 0.60% | (27.70%)
Change in tax status of PE Op Co. |  | (1.60%) |
Convertible debt instruments |  |  | (297.70%)
Other | (3.20%) | (1.30%) | (2.60%)
Effective rate | 34.70% | 36.80% | 0.00%

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