| Revenue | 5/31/2017 | 5/31/2016 | 5/31/2015 |
| Total Revenue | 37,728,000 | 37,047,000 | 38,226,000 |
| Cost of Revenue | 7,469,000 | 7,479,000 | 7,532,000 |
| Gross Profit | 30,259,000 | 29,568,000 | 30,694,000 |
| Operating Expenses |
| Research Development | 6,159,000 | 5,787,000 | 5,524,000 |
| Selling General and Administrative | 9,373,000 | 9,039,000 | 8,732,000 |
| Non Recurring | 566,000 | 500,000 | 418,000 |
| Others | 1,451,000 | 1,638,000 | 2,149,000 |
| Total Operating Expenses | 17,549,000 | 16,964,000 | 16,823,000 |
| Operating Income or Loss | 12,710,000 | 12,604,000 | 13,871,000 |
| Income from Continuing Operations |
| Total Other Income/Expenses Net | 605,000 | 305,000 | 106,000 |
| Earnings Before Interest and Taxes | 13,315,000 | 12,909,000 | 13,977,000 |
| Interest Expense | 1,798,000 | 1,467,000 | 1,143,000 |
| Income Before Tax | 11,517,000 | 11,442,000 | 12,834,000 |
| Income Tax Expense | 2,182,000 | 2,541,000 | 2,896,000 |
| Minority Interest | 386,000 | 501,000 | 435,000 |
| Net Income From Continuing Ops | 9,335,000 | 8,901,000 | 9,938,000 |
| Non-recurring Events |
| Discontinued Operations | - | - | - |
| Extraordinary Items | - | - | - |
| Effect Of Accounting Changes | - | - | - |
| Other Items | - | - | - |
| Net Income |
| Net Income | 9,335,000 | 8,901,000 | 9,938,000 |
| Preferred Stock And Other Adjustments | - | - | - |
| Net Income Applicable To Common Shares | 9,335,000 | 8,901,000 | 9,938,000 |
