Condensed Consolidated Balance Sheets (USD $)	Mar. 31, 2012	Sep. 30, 2011
Current assets:
Cash and cash equivalents	$ 8,813,309	$ 8,722,935
Marketable securities	6,810,597	26,182,308
Accounts receivable, net	9,931,708	8,644,332
Inventories, net	11,367,361	11,278,694
Prepaid expenses and other current assets	1,607,363	1,361,259
Deferred income tax asset	2,036,493	1,618,495
Total current assets	40,566,831	57,808,023
Property, plant and equipment:
Land and buildings	10,656,477	10,571,723
Equipment and fixtures	20,036,940	19,531,006
Property, plant and equipment	30,693,417	30,102,729
Less accumulated depreciation	(18,511,968)	(18,050,044)
Total property, plant and equipment	12,181,449	12,052,685
Deferred income tax asset	1,180,015	1,242,010
Goodwill	9,859,132	9,764,075
Intangibles, net	10,040,656	10,272,671
Total assets	73,828,083	91,139,464
Current liabilities:
Accounts payable	2,580,460	2,773,398
Accrued compensation	1,320,210	1,460,726
Accrued expenses	1,378,464	1,500,544
Current maturities of debt	0	17,862,185
Total current liabilities	5,279,134	23,596,853
Deferred tax liabilities	1,931,143	1,565,764
Shareholders' equity:
Common stock, no par value: Authorized shares - 40,000,000 Issued and outstanding shares (12,105,050 at March 31, 2012; 12,141,817 at September 30, 2011)	56,417,541	56,829,350
Retained earnings	13,790,541	13,263,374
Accumulated other comprehensive loss	(3,590,276)	(4,115,877)
Total shareholders' equity	66,617,806	65,976,847
Total liabilities and shareholders' equity	$ 73,828,083	$ 91,139,464