| Revenue | 7/31/2019 | 7/31/2018 | 7/31/2017 | 7/31/2016 |
| Total Revenue | 6,784,000 | 6,025,000 | 5,196,000 | 4,694,000 |
| Cost of Revenue | 1,147,000 | 963,000 | 798,000 | 730,000 |
| Gross Profit | 5,637,000 | 5,062,000 | 4,398,000 | 3,964,000 |
| Operating Expenses |
| Research Development | 1,233,000 | 1,186,000 | 998,000 | 881,000 |
| Selling General and Administrative | 2,524,000 | 2,295,000 | 1,968,000 | 1,807,000 |
| Non Recurring | - | - | - | - |
| Others | - | - | - | - |
| Total Operating Expenses | 4,930,000 | 4,465,000 | 3,778,000 | 3,452,000 |
| Operating Income or Loss | 1,854,000 | 1,560,000 | 1,418,000 | 1,242,000 |
| Income from Continuing Operations |
| Total Other Income/Expenses Net | 27,000 | 6,000 | -28,000 | -39,000 |
| Earnings Before Interest and Taxes | 1,854,000 | 1,560,000 | 1,418,000 | 1,242,000 |
| Interest Expense | -15,000 | -20,000 | -31,000 | -35,000 |
| Income Before Tax | 1,881,000 | 1,566,000 | 1,390,000 | 1,203,000 |
| Income Tax Expense | 324,000 | 237,000 | 405,000 | 397,000 |
| Minority Interest | - | - | - | - |
| Net Income From Continuing Ops | 1,557,000 | 1,329,000 | 985,000 | 806,000 |
| Non-recurring Events |
| Discontinued Operations | - | - | - | 173,000 |
| Extraordinary Items | - | - | - | - |
| Effect Of Accounting Changes | - | - | - | - |
| Other Items | - | - | - | - |
| Net Income |
| Net Income | 1,557,000 | 1,329,000 | 985,000 | 979,000 |
| Preferred Stock And Other Adjustments | - | - | - | - |
| Net Income Applicable To Common Shares | 1,557,000 | 1,329,000 | 985,000 | 979,000 |