Condensed Statements Of Cash Flows Unaudited (USD $)	3 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Net income	$ 999,599	$ 501,158
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	96,081	105,236
Deferred taxes	21,105	21,105
Loss on disposal of assets	21,081
Stock based compensation	112,153	58,287
Changes in operating assets and liabilities:
Accounts receivable, net	1,202,106	925,045
Inventories	230,693	(92,949)
Prepaid expenses and other	(58,308)	3,045
Accounts payable and accrued expenses	(1,939,090)	120,342
Net cash provided by operating activities	685,420	1,641,269
Cash flows from investing activities
Purchases of property and equipment	(63,430)	(38,413)
Purchases of investments	(5,232,000)	(160,659)
Proceeds from maturities of investments	596,000	195,527
Net cash used in investing activities	(4,699,430)	(3,545)
Cash flows from financing activities
Proceeds from issuance of common stock under employee stock purchase plan	70,305	37,722
Proceeds from issuance of common stock upon exercise of stock options	37,681	10,530
Net cash provided by financing activities	107,986	48,252
Increase (decrease) in cash and cash equivalents	(3,906,024)	1,685,976
Cash and cash equivalents, beginning of period	11,281,027	5,285,719
Cash and cash equivalents, end of period	$ 7,375,003	$ 6,971,695