| | | 2017 | | 2016 | | 2015 | | |||
| | | | | | | | | | | |
| Current: | | | | | | | | | | |
| Federal | | $ | - | | $ | - | | $ | - | |
| State | | | - | | | - | | | - | |
| Total current | | | - | | | - | | | - | |
| | | | | | | | | | | |
| Deferred: | | | | | | | | | | |
| Federal | | | 1,263,677 | | | (2,424,497) | | | (3,372,964) | |
| State | | | 214,628 | | | 21,452 | | | (155,352) | |
| Total deferred | | | 1,478,305 | | | (2,403,045) | | | (3,528,316) | |
| Change in valuation allowance | | | (1,478,305) | | | 2,403,045 | | | 3,528,316 | |
| | | $ | - | | $ | - | | $ | - | |
| | | 2017 | | 2016 | | 2015 | | |||
| | | | | | | | | | | |
| Statutory federal rate | | | (34.0) | % | | (34.0) | % | | (34.0) | % |
| Other items | | | (2.4) | | | (0.2) | | | 0.0 | |
| Derivative liability | | | 0.4 | | | 11.9 | | | (0.5) | |
| Stock based compensation | | | 2.0 | | | 1.5 | | | 3.1 | |
| Research and development credit carryforward | | | (1.8) | | | - | | | - | |
| State tax provision, net of federal benefit | | | 1.1 | | | 0.1 | | | (0.9) | |
| Federal tax rate change | | | 46.1 | | | - | | | - | |
| Valuation allowance | | | (11.4) | | | 20.7 | | | 32.3 | |
| | | | | | | | | | | |
| Effective tax rate (benefit) provision | | | 0.0 | % | | 0.0 | % | | 0.0 | % |
| | | 2017 | | 2016 | | 2015 | | |||
| | | | | | | | | | | |
| Deferred tax assets: | | | | | | | | | | |
| Net operating loss carry-forward | | $ | 9,917,641 | | $ | 11,626,143 | | $ | 7,745,734 | |
| Accounts receivable reserve | | | - | | | 3,499 | | | 3,499 | |
| Inventory | | | 48,011 | | | 96,934 | | | 38,707 | |
| Stock-based compensation | | | 388,925 | | | 282,850 | | | 1,599,916 | |
| Start-up expenditures | | | 279,709 | | | 477,917 | | | 514,680 | |
| Research and development credit carryforward | | | 232,198 | | | - | | | - | |
| Loss on equity investment | | | 11,760 | | | 139,676 | | | 68,877 | |
| Severance liability | | | - | | | 69,860 | | | 147,070 | |
| Other | | | 4,272 | | | 21,423 | | | 9,272 | |
| | | | 10,882,516 | | | 12,718,302 | | | 10,127,755 | |
| Deferred tax liabilities: | | | | | | | | | | |
| Machinery and equipment | | | (220,888) | | | (316,232) | | | (227,186) | |
| Patents and trademarks | | | (558,760) | | | (807,137) | | | (767,044) | |
| Other intangible assets | | | (124,953) | | | (138,713) | | | (80,349) | |
| | | | (904,601) | | | (1,262,082) | | | (1,074,579) | |
| Valuation allowance | | | (9,977,915) | | | (11,456,220) | | | (9,053,176) | |
| | | | | | | | | | | |
| Net deferred taxes | | $ | - | | $ | - | | $ | - | |