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STATEMENTS OF INCOME (USD $)
In Thousands, except Per Share data
 3 Months Ended
Jun. 30, 2011
Jun. 30, 2010
Sales $ 8,888 $ 7,455
Cost of Goods Sold 3,500 3,074
Selling, General & Administrative 2,287 1,944
Research and Development 408 223
Other Expenses and (Income) 50 12
Total Cost, Expenses and Nonoperating (Income) Expense 6,245 5,253
Earnings Before Income Taxes 2,643 2,202
Income Taxes 964 882
Net Income $ 1,679 $ 1,320
Net Income Per Share (Basic) (in dollars per share) $ 0.51 $ 0.41
Net Income Per Share (Diluted) (in dollars per share) $ 0.49 $ 0.40
Average Common Shares Outstanding (Basic) (in shares) 3,274 3,212
Average Common Shares Outstanding (Diluted) (in shares) 3,414 3,308