| 6. | Income Taxes |
| | | 2017 | | 2016 | | ||
| Federal tax (benefit) on consolidated net loss at statutory rate | | $ | (855,136) | | $ | (2,734,067) | |
| Change in valuation allowance | | | (3,419,114) | | | 38,090 | |
| Add back tax benefit on loss attributable to non-controlling interest in subsidiary | | | | | | 396,415 | |
| Book loss related to joint venture deconsolidation | | | | | | 900,910 | |
| Basis limited on joint venture loss | | | | | | 429,450 | |
| Basis difference related to investment in joint venture | | | (110,114) | | | 705,500 | |
| Return to provision | | | (1,037,754) | | | | |
| Discrete due to joint venture deconsolidation | | | | | | 245,854 | |
| Federal rate change true-up | | | 5,421,298 | | | | |
| Other | | | 820 | | | 17,848 | |
| Benefit for income taxes, net | | $ | | | $ | | |
| | | 2017 | | 2016 | | ||
| Deferred tax assets (liabilities) | | | | | | | |
| Net operating loss carryforwards | | $ | 8,162,123 | | $ | 11,956,967 | |
| Accrued compensation | | | 31,844 | | | 35,249 | |
| Depreciation | | | 42,688 | | | 46,975 | |
| Section 263a inventory adjustment | | | 29,171 | | | 43,787 | |
| Stock-based compensation | | | 688,148 | | | 765,928 | |
| Outside basis difference in joint venture | | | (224,725) | | | (705,500) | |
| Other | | | 28,232 | | | 33,189 | |
| Total | | | 8,757,481 | | | 12,176,595 | |
| Less: Valuation allowance | | | (8,757,481) | | | (12,176,595) | |
| Net deferred tax asset | | $ | | | $ | | |
| Year of Expiration | | Net Operating Losses | | |
| 2018 | | $ | 1,425,000 | |
| 2019 | | | 1,234,000 | |
| 2020 | | | 2,849,000 | |
| 2021 | | | 4,168,000 | |
| 2023 | | | 1,217,000 | |
| 2024 | | | 646,000 | |
| 2025 | | | 589,000 | |
| 2026 | | | 873,000 | |
| 2027 | | | 2,607,000 | |
| 2028 | | | 2,512,000 | |
| 2029 | | | 2,196,000 | |
| 2030 | | | 1,232,000 | |
| 2031 | | | 1,028,000 | |
| 2032 | | | 437,000 | |
| 2033 | | | 37,000 | |
| 2034 | | | 6,409,000 | |
| 2035 | | | 3,093,000 | |
| 2036 | | | 4,995,000 | |
| 2037 | | | 1,320,000 | |
| Total | | $ | 38,867,000 | |