| Provision for Income Taxes | | 2017 | | 2016 | | 2015 | | |||
| Deferred taxes | | $ | 10,416,171 | | $ | (19,987,585) | | $ | (5,003,713) | |
| Provision for (Benefit from) Income Taxes | | $ | 10,416,171 | | $ | (19,987,585) | | $ | (5,003,713) | |
| Rate Reconciliation | | 2017 | | 2016 | | 2015 | | |||
| Tax at federal statutory rate (34%) | | $ | 4,194,556 | | $ | (19,592,592) | | $ | (4,779,205) | |
| Non-deductible expenses | | | 6,158 | | | 2,558 | | | 6,599 | |
| Excess tax benefit from stock option exercises | | | (453,217) | | | 15,055 | | | (89,597) | |
| Adjust prior estimates to tax return | | | (58,766) | | | 167,526 | | | - | |
| States taxes, net of Federal benefit | | | 124,200 | | | (580,132) | | | (141,510) | |
| Effect of departure from State of Kansas | | | (350,059) | | | - | | | - | |
| Adjustment for change in future effective tax rate (1) | | | 6,953,299 | | | - | | | - | |
| Provision for (Benefit from) Income Taxes | | $ | 10,416,171 | | $ | (19,987,585) | | $ | (5,003,713) | |
| Deferred Taxes: | | 2017 | | 2016 | | ||
| Deferred tax liabilities | | | | | | | |
| Property and equipment | | $ | 27,563,290 | | $ | 10,092,289 | |
| | | | | | | | |
| Deferred tax assets | | | | | | | |
| Stock-based compensation | | | 6,667,643 | | | 3,814,909 | |
| Operating loss and IDC carryforwards | | | 32,127,847 | | | 26,329,288 | |
| Deferred tax assets | | | 38,795,490 | | | 30,144,197 | |
| Net deferred income tax asset | | $ | (11,232,200) | | $ | (20,051,908) | |