CONSOLIDATED BALANCE SHEETS (USD $)	Sep. 30, 2012	Sep. 30, 2011
Current assets:
Cash and cash equivalents	$ 13,921,363	$ 8,722,935
Marketable securities	6,779,695	26,182,308
Accounts receivable, less allowance for doubtful accounts ($86,268 - 2012; $44,595 - 2011)	11,008,429	8,644,332
Inventories	9,883,651	11,278,694
Prepaid expenses and other current assets	1,726,908	1,361,259
Deferred income tax asset	1,287,177	1,618,495
Total current assets	44,607,223	57,808,023
Property, plant and equipment:
Land	1,111,314	1,115,883
Buildings	9,539,813	9,455,840
Equipment and fixtures	20,550,952	19,531,006
Property, plant and equipment	31,202,079	30,102,729
Less accumulated depreciation	(19,340,007)	(18,050,044)
Total property, plant and equipment	11,862,072	12,052,685
Deferred income tax asset	1,030,994	1,242,010
Goodwill	9,053,091	9,094,725
Intangible assets, less accumulated amortization ($4,628,474 - 2012; $3,682,633 - 2011)	9,191,727	10,061,655
Patents, less accumulated amortization ($1,385,266 - 2012; $1,328,486 - 2011)	185,627	211,016
Total assets	75,930,734	90,470,114
Current liabilities:
Accounts payable	3,070,329	2,773,398
Accrued compensation	1,970,468	1,460,726
Accrued expenses	1,456,929	1,500,544
Current maturities of debt		17,862,185
Total current liabilities	6,497,726	23,596,853
Long-term liabilities	1,137,212	896,414
Shareholders' equity:
Common stock, no par value: Authorized shares - 40,000,000 Issued and outstanding shares: (12,120,050 - 2012; 12,141,817 - 2011)	56,904,308	56,829,350
Retained earnings	15,313,858	13,263,374
Accumulated other comprehensive loss	(3,922,370)	(4,115,877)
Total shareholders' equity	68,295,796	65,976,847
Total liabilities and shareholders' equity	$ 75,930,734	$ 90,470,114