| 2016 | 2015 | |||||||
| Current: | ||||||||
| Federal | $ | (71,070 | ) | $ | --- | |||
| State | 2,504 | 3,070 | ||||||
| Total current tax provision | (68,566 | ) | 3,070 | |||||
| Deferred: | ||||||||
| Federal | (435,495 | ) | 1,317,125 | |||||
| State | - | --- | ||||||
| Total deferred tax provision | (435,495 | ) | 1,317,125 | |||||
| Income tax (benefit)/expense | $ | (504,061 | ) | $ | 1,320,195 | |||
| 2016 | 2015 | |||||||
| Allowance for doubtful accounts | $ | 771 | $ | 6,345 | ||||
| Inventory capitalization | 19,071 | 11,540 | ||||||
| Depreciation and amortization | (211,014 | ) | (228,610 | ) | ||||
| Investment tax credits | 475,000 | 475,000 | ||||||
| Research & development tax credits | 1,278,690 | 1,134,168 | ||||||
| Compensation costs | 1,000,073 | 730,909 | ||||||
| Vacation accrual | 333,396 | 323,860 | ||||||
| Accrued loss on legal settlement | -- | -- | ||||||
| Net operating loss carryforward | (7,280 | ) | -- | |||||
| Capital loss carryforward | 26,627 | 26,627 | ||||||
| Gross deferred tax asset | 2,915,334 | 2,479,839 | ||||||
| Less valuation allowance | (475,000 | ) | (475,000 | ) | ||||
| Net deferred tax asset | $ | 2,440,334 | $ | 2,004,839 | ||||
| Net current deferred tax asset | 428,355 | 398,009 | ||||||
| Net long-term deferred tax asset | 2,011,979 | 1,606,830 | ||||||
| Net deferred tax asset | $ | 2,440,334 | $ | 2,004,839 | ||||
| 2016 | 2015 | |||||||
| Expected provision at federal statutory tax rate (34%) | $ | (222,083) | $ | 1,538,565 | ||||
| State taxes, net of federal benefit | 2,504 | 3,070 | ||||||
| Stock-based compensation expense | (269,163 | ) | (252,288 | ) | ||||
| Net operating loss carryforward | (21,412 | ) | 954,581 | |||||
| Federal research & development credit | (144,522 | ) | (437,303 | ) | ||||
| Other permanent differences | 150,615 | (486,430 | ) | |||||
| Income tax (benefit)/expense | $ | (504,061 | ) | $ | 1,320,195 | |||