| 2017 | 2016 | |||||||
| Expected income tax benefit at statutory rate | $ | (836,000 | ) | $ | (1,537,000 | ) | ||
| State taxes, net of federal benefit | (75,000 | ) | (138,000 | ) | ||||
| Permanent differences and other | 3,000 | (13,000 | ) | |||||
| Change in valuation allowance | 908,000 | 1,688,000 | ||||||
| Income tax benefit | $ | - | $ | - | ||||
| 2017 | 2016 | |||||||
| NOLs – noncurrent | $ | 20,087,000 | $ | 19,705,000 | ||||
| Stock-based compensation - current | 5,589,000 | 5,392,000 | ||||||
| Property and equipment – noncurrent | 2,014,000 | 2,014,000 | ||||||
| Deferred compensation - noncurrent | 2,017,000 | 1,688,000 | ||||||
| Gross deferred tax assets | 29,707,000 | 28,799,000 | ||||||
| Valuation allowance | (29,707,000 | ) | (28,799,000 | ) | ||||
| Net deferred tax assets | $ | - | $ | - | ||||