| Years Ended December 31, | ||||||||
| 2017 | 2016 | |||||||
| Loss carry forwards | $ | 39,304 | $ | 57,097 | ||||
| Derivative valuations | 521 | 685 | ||||||
| NQSO | 1,794 | 2,214 | ||||||
| Tax Credits | 382 | 433 | ||||||
| Other | (54 | ) | (99 | ) | ||||
| Total deferred tax asset | 41,947 | 60,330 | ||||||
| Valuation allowance | (41,947 | ) | (60,330 | ) | ||||
| Total deferred tax asset, net | - | - | ||||||
| Years Ended December 31, | ||||||||||||
| 2017 | 2016 | 2015 | ||||||||||
| Expected federal tax benefit | -34.0 | % | -34.0 | % | -34.0 | % | ||||||
| Permanent items | 1.7 | % | 5.6 | % | 0.4 | % | ||||||
| Net operating loss utilized or expired | 0.0 | % | 0.0 | % | 0.0 | % | ||||||
| Increase in valuation allowance and others | 32.3 | % | 28.4 | % | 33.6 | % | ||||||
| Effective tax rate | 0 | % | 0 | % | 0 | % | ||||||