Consolidated Balance Sheets (USD $)	Sep. 30, 2011	Sep. 30, 2010
Current assets:
Cash and cash equivalents	$ 8,722,935	$ 4,545,907
Marketable securities	26,182,308	30,967,007
Accounts receivable, less allowance for doubtful accounts ($44,595 - 2011; $54,048 - 2010)	8,644,332	7,858,540
Inventories	11,278,694	9,240,291
Prepaid expenses and other current assets	1,361,259	846,899
Deferred income tax asset	1,618,495	872,849
Total current assets	57,808,023	54,331,493
Property, plant and equipment:
Land	1,115,883	695,872
Buildings	9,455,840	7,301,551
Equipment and fixtures	19,531,006	18,543,813
Property, plant and equipment	30,102,729	26,541,236
Less accumulated depreciation	(18,050,044)	(16,523,997)
Total property, plant and equipment	12,052,685	10,017,239
Deferred income tax asset	1,242,010	1,175,052
Goodwill	9,764,075	4,561,781
Intangible assets, less accumulated amortization ($3,682,633 - 2011; $2,747,745 - 2010)	10,061,655	5,351,620
Patents, less accumulated amortization ($1,328,486 - 2011; $1,268,907 - 2010)	211,016	229,106
Total assets	91,139,464	75,666,291
Current liabilities:
Accounts payable	2,773,398	2,016,058
Accrued compensation	1,460,726	1,458,652
Accrued expenses	1,500,544	610,570
Current maturities of debt	17,862,185	2,641,233
Total current liabilities	23,596,853	6,726,513
Long-term liabilities	1,565,764	46,327
Shareholders' equity:
Common stock, no par value: Authorized shares - 40,000,000 Issued and outstanding shares: (12,141,817 - 2011; 12,072,452 - 2010)	56,829,350	57,200,531
Retained earnings	13,263,374	14,578,678
Accumulated other comprehensive loss	(4,115,877)	(2,885,758)
Total shareholders' equity	65,976,847	68,893,451
Total liabilities and shareholders' equity	$ 91,139,464	$ 75,666,291