CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)	3 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Operating activities:
Net income (loss)	$ 1,012,145	$ (75,347)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities
Depreciation	424,043	399,271
Amortization	252,605	249,633
Stock based compensation	202,392	315,748
Deferred income tax	(60,722)	55,038
Changes in operating assets and liabilities:
Accounts receivable	1,720,183	151,151
Inventories	320,585	(450,869)
Other current assets	149,239	(309,393)
Accounts payable	(665,215)	(188,979)
Income tax payable	(7,370)	(90,480)
Other current liabilities	(721,257)	(641,947)
Net cash provided by (used in) operating activities	2,626,628	(586,174)
Investing activities:
Purchase of property, plant and equipment	(784,111)	(585,127)
Purchase of intangibles	(12,003)	(8,245)
Purchases of marketable securities	(6,498,528)	(13,014,689)
Sales and maturities of marketable securities	6,539,758	14,101,455
Net cash provided by (used in) investing activities	(754,884)	493,394
Financing activities:
Proceeds from long-term debt		788,623
Repurchase of common stock		(1,088,619)
Proceeds from issuance of common stock	413,570	113,141
Net cash provided by (used in) financing activities	413,570	(186,855)
Effect of exchange rate on cash and cash equivalents	104,429	(105,722)
Increase (decrease) in cash and cash equivalents	2,389,743	(385,357)
Cash and cash equivalents at beginning of period	13,921,363	8,722,935
Cash and cash equivalents at end of period	16,311,106	8,337,578
Supplemental Cash Flow Information
Income taxes paid	$ 336,472