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CONDENSED CONSOLIDATED BALANCE SHEETS (USD $)
Jun. 30, 2011
Sep. 30, 2010
Current Assets    
Cash and cash equivalents $ 42,581,389 $ 40,916,346
Accounts receivable, net 3,064,685 2,529,976
Inventories 4,376,978 4,656,392
Deferred income taxes 418,853 522,352
Prepaid expenses and other current assets 648,664 982,768
Total current assets 51,090,569 49,607,834
Property and equipment, net 7,557,379 7,761,538
Other assets 243,517 221,150
Total Assets 58,891,465 57,590,522
Current Liabilities    
Current portion of capitalized lease obligations 9,908 9,908
Accounts payable 1,091,482 543,877
Accrued expenses 2,288,975 2,585,060
Deferred revenue 336,410 157,933
Total current liabilities 3,726,775 3,296,778
Long-term portion of capitalized lease obligations 6,431 15,560
Deferred revenue   8,688
Deferred income taxes 546,993 649,929
Other liabilities 175,601 151,530
Total Liabilities 4,455,800 4,122,485
Commitments and contingencies    
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 June 30, 2011 and September 30, 2010    
Common stock, $.001 par value: 75,000,000 shares authorized, 18,276,039 and 18,244,701 issued at June 30, 2011 and September 30, 2010, respectively 18,276 18,245
Additional paid-in capital 47,094,292 46,831,646
Retained earnings 26,614,603 25,909,652
Treasury stock, at cost, 1,482,510 shares at June 30, 2011 and September 30, 2010 (19,291,506) (19,291,506)
Total Shareholders' Equity 54,435,665 53,468,037
Total Liabilities and Shareholders' Equity $ 58,891,465 $ 57,590,522