CONSOLIDATED BALANCE SHEETS (USD $)	Sep. 30, 2011	Sep. 30, 2010
Current assets
Cash and cash equivalents	$ 42,625,854	$ 40,916,346
Accounts receivable, net	3,124,114	2,529,976
Inventories	3,508,595	4,656,392
Deferred income taxes	438,635	522,352
Prepaid expenses and other current assets	875,636	982,768
Total current assets	50,572,834	49,607,834
Property and equipment, net	7,476,362	7,761,538
Other assets	208,408	221,150
Total assets	58,257,604	57,590,522
Current liabilities
Current portion of capitalized lease obligations	13,189	9,908
Accounts payable	443,516	543,877
Accrued expenses	2,551,389	2,585,060
Deferred revenue	232,630	157,933
Total current liabilities	3,240,724	3,296,778
Long-term portion of capitalized lease obligations		15,560
Deferred revenue		8,688
Deferred income taxes	566,963	649,929
Other liabilities	189,130	151,530
Total liabilities	3,996,817	4,122,485
Commitments and contingencies (See Note 14)
Shareholders' equity
Preferred Stock, 10,000,000 shares authorized, $.001 par value, of which 200,000 shares are authorized as Class A Convertible stock. No shares issued and outstanding at September 30, 2011 and 2010
Common stock, $.001 par value: 75,000,000 shares authorized, 18,286,884 and 18,244,701 issued at September 30, 2011 and 2010, respectively	18,287	18,245
Additional paid-in capital	47,206,690	46,831,646
Retained earnings	26,626,242	25,909,652
Treasury stock, at cost, 1,544,910 and 1,482,510 shares at September 30, 2011 and 2010, respectively	(19,590,432)	(19,291,506)
Total Shareholders' Equity	54,260,787	53,468,037
Total liabilities and shareholders' equity	$ 58,257,604	$ 57,590,522