Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $)	6 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Operating activities:
Net income (loss)	$ 527,167	$ (1,428,480)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation	813,815	722,820
Amortization	506,337	427,794
Stock based compensation	563,667	877,594
Deferred income tax expense (benefit)	15,433	(26,529)
Changes in operating assets and liabilities, net of acquisition:
Accounts receivable, net	(1,204,094)	244,374
Inventories, net	(20,175)	(804,070)
Other current assets	(246,840)	(1,387,272)
Accounts payable	(398,174)	442,835
Income tax payable	171,883	60,447
Other current liabilities	(350,328)	(289,144)
Net cash provided by (used in) operating activities	378,691	(1,159,631)
Investing activities:
Purchase of property, plant and equipment	(913,199)	(666,069)
Cash acquired in business acquisition		55,973
Purchase of intangibles	(251,880)	(24,558)
Purchases of marketable securities	(16,026,987)	(16,855,217)
Sales and maturities of marketable securities	35,648,715	18,446,463
Net cash provided by investing activities	18,456,649	956,592
Financing activities:
Proceeds from long-term debt	778,623	1,000,000
Payments on long-term debt	(18,640,808)	(1,647,140)
Excess tax benefit from exercises of stock options		618,682
Repurchase of common stock	(1,088,619)
Proceeds from issuance of common stock	113,142	506,809
Net cash provided by (used in) financing activities	(18,837,662)	478,351
Effect of exchange rate on cash and cash equivalents	92,696	68,045
Increase in cash and cash equivalents	90,374	343,357
Cash and cash equivalents at beginning of period	8,722,935	4,545,907
Cash and cash equivalents at end of period	8,813,309	4,889,264
Supplemental Cash Flow Information
Interest paid	164,178
Income taxes paid	$ 205,664	$ 60,000