| Note 7. | Income Taxes |
| | | April 30, 2017 | | April 30, 2016 | | ||
| Deferred tax asset | | $ | 1,557,470 | | $ | 2,348,299 | |
| | | April 30, 2017 | | April 30, 2016 | | ||
| Deferred tax assets: | | | | | | | |
| Net operating loss carryforwards | | $ | 345,678 | | $ | 5,284 | |
| Tax credit carryforwards | | | 437,896 | | | 352,709 | |
| Stock options | | | 246,726 | | | 237,937 | |
| Impairment of notes receivable and land | | | 2,101,288 | | | 2,644,330 | |
| Revenue not recognized for tax reporting and other | | | 187,770 | | | 172,135 | |
| Accrued expenses | | | 104,580 | | | 198,273 | |
| Other | | | 15,396 | | | 100,138 | |
| Total deferred tax assets | | | 3,439,334 | | | 3,710,806 | |
| Deferred tax liabilities: | | | | | | | |
| Amortization of intangibles | | | (1,404,551) | | | (1,024,020) | |
| Fixed assets | | | (263,072) | | | (127,956) | |
| Prepaid expenses | | | (214,241) | | | (210,531) | |
| Total deferred tax liabilities | | | (1,881,864) | | | (1,362,507) | |
| Net deferred tax assets | | $ | 1,557,470 | | $ | 2,348,299 | |
| | | Year Ended | | ||||||||||
| | | April 30, 2017 | | April 30, 2016 | | ||||||||
| | | Percent | | Dollars | | Percent | | Dollars | | ||||
| | | | | | | | | | | | | | |
| Income tax expense at statutory federal rate | | | 34.0 | | $ | 460,630 | | | 34.0 | | $ | 857,664 | |
| Impairment of nondeductible goodwill | | | 27.6 | | | 374,500 | | | 11.3 | | | 283,900 | |
| Non-deductible expenses | | | 2.8 | | | 37,933 | | | 2.3 | | | 59,006 | |
| Utilization of general business credits | | | (6.3) | | | (85,187) | | | (2.8) | | | (71,051) | |
| Adjustment to deferred balances | | | - | | | - | | | 3.0 | | | 76,157 | |
| Tax return to provision adjustments | | | 0.2 | | | 2,953 | | | 0.6 | | | 15,821 | |
| Income tax expense at effective income tax rate | | | 58.3 | | $ | 790,829 | | | 48.4 | | $ | 1,221,497 | |