Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $)	3 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Operating activities:
Net loss	$ (75,347)	$ (169,082)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities, net of acquisition:
Depreciation	399,271	337,265
Amortization	249,633	157,268
Stock based compensation	315,748	295,469
Deferred income tax	55,038	82,483
Changes in operating assets and liabilities:
Accounts receivable	151,151	1,247,864
Inventories	(450,869)	(306,572)
Other current assets	(309,393)	(588,317)
Accounts payable	(188,979)	(19,512)
Income tax payable	(90,480)	(177,898)
Other current liabilities	(641,947)	(655,254)
Net cash provided by (used in) operating activities	(586,174)	203,714
Investing activities:
Purchase of property, plant and equipment	(585,127)	(361,345)
Purchase of intangibles	(8,245)	(12,820)
Purchases of marketable securities	(13,014,689)	(7,044,243)
Sales and maturities of marketable securities	14,101,455	8,808,021
Net cash provided by investing activities	493,394	1,389,613
Financing activities:
Proceeds from long-term debt	788,623
Payments on long-term debt		(1,647,140)
Excess tax benefit from exercises of stock options		193,526
Repurchase of common stock	(1,088,619)
Proceeds from issuance of common stock	113,141	160,350
Net cash used in financing activities	(186,855)	(1,293,264)
Effect of exchange rate on cash and cash equivalents	(105,722)	(16,682)
Increase (decrease) in cash and cash equivalents	(385,357)	283,381
Cash and cash equivalents at beginning of period	8,722,935	4,545,907
Cash and cash equivalents at end of period	8,337,578	4,829,288
Supplemental Cash Flow Information
Interest paid		23,318
Income taxes paid		$ 5,000