Statements Of Cash Flows (USD $)	12 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Net income	$ 6,167,446	$ 1,180,954
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation and amortization	358,502	498,014
Deferred income taxes	(2,407,435)	86,628
Gain on sale of assets	(44,173)
Stock-based compensation expense	535,347	167,725
Changes in operating assets and liabilities:
Accounts receivable, net	15,515	(520,965)
Inventories	(1,244,845)	(358,444)
Other current assets	(41,164)	8,406
Accounts payable and accrued expenses	1,958,026	(432,973)
Net cash provided by operating activities	5,297,219	629,345
Cash flows from investing activities:
Purchases of property and equipment	(745,790)	(452,675)
Purchase of investments	(1,886,659)	(2,479,465)
Proceeds from sale of property and equipment	718,537	1,046
Patent additions		(23,099)
Sale of investments	2,331,690	2,427,000
Proceeds from notes receivable		435,336
Net cash used in investing activities	417,778	(91,857)
Cash flows from financing activities:
Payment of long-term debt		(33,081)
Proceeds from issuance of common stock under employee stock purchase plan	87,667
Proceeds from issuance of common stock	180,166	49,577
Excess tax benefit from exercise of stock options	12,478
Net cash provided by financing activities	280,311	16,496
Increase in cash and cash equivalents	5,995,308	553,984
Cash and cash equivalents at beginning of year	5,285,719	4,731,735
Cash and cash equivalents at end of year	11,281,027	5,285,719
Supplemental cash flow information: Cash paid during the year for:
Interest		820
Income Taxes	$ 48,263	$ 26,802