| Year ended December 31, | ||||||||
| 2016 | 2015 | |||||||
| Current | ||||||||
| State | $ | 19,801 | $ | 64,809 | ||||
| Federal | 67,066 | 320,931 | ||||||
86,867 | 385,740 | |||||||
| Deferred | ||||||||
| State | 1,560 | (19,340 | ) | |||||
| Federal | 7,998 | (26,452 | ) | |||||
9,558 | (45,792 | ) | ||||||
| Income tax expense | $ | 96,425 | $ | 339,948 | ||||
| Year ended December 31, | ||||||||
| 2016 | 2015 | |||||||
| Federal statutory rate | 34.0 | % | 34.0 | % | ||||
| State taxes | 7.8 | 3.3 | ||||||
| Nondeductible lobbying expenses | 7.4 | 3.6 | ||||||
| Other Nondeductible/Nontaxable Items 1.5 2.4 | 7.0 | 1.5 | ||||||
| Other,net | ( 2.3 | ) | - | |||||
| Effective tax rate | 53.9 | % | 42.4 | % | ||||
| December 31, | ||||||||
| 2016 | 2015 | |||||||
| Intangible assets | $ | 28,279 | 8,745 | |||||
| Accrued warranty expense | 91,828 | 137,050 | ||||||
| Accrued payroll | 28,282 | 16,892 | ||||||
| Share-based compensation | 54,663 | 63,846 | ||||||
| State net operation loss carryforward | 7,442 | 7,455 | ||||||
| Other,net | 1,939 | (11,985 | ) | |||||
| Valuation allowance | (7,442 | ) | (7,455 | ) | ||||
| $ | 204,991 | $ | 214,548 | |||||