Statements of Shareholders Equity (USD $)	12 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2009	Sep. 30, 2008
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ 22,443,927	$ 33,543,944	$ 35,399,484	$ 34,603,980
Net Income (Loss) Attributable to Parent	(11,459,946)	(1,249,758)	2,016,641
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax		(25,001)	(103,056)
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax		56,456	3,611
Comprehensive Income (Loss), Net of Tax, Attributable to Parent		(1,301,795)	1,138,575
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax		(83,492)	(778,621)
Payments for Repurchase of Common Stock	(129,164)	(858,359)	(1,262,169)
Deferred Compensation Arrangement with Individual, Fair Value of Shares Issued	0	0	0
Proceeds from Stock Options Exercised	57,480	5,307	397,230
Tax Benefit from Stock Options Exercised	0	3,955	175,440
Share-based Compensation	293,906	290,584	322,580
Deferred Compensation Arrangement with Individual, Compensation Expense	4,768	4,768	23,848
Additional Paid-in Capital [Member]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	25,041,273	24,583,239	24,294,511	23,261,936
Net Income (Loss) Attributable to Parent	0	0	0
Payments for Repurchase of Common Stock		0	0
Deferred Compensation Arrangement with Individual, Fair Value of Shares Issued	(60)	(59,937)	(18)
Proceeds from Stock Options Exercised	159,420	49,358	510,725
Tax Benefit from Stock Options Exercised	0	3,955	175,440
Share-based Compensation	293,906	290,584	322,580
Deferred Compensation Arrangement with Individual, Compensation Expense	4,768	4,768	23,848
Retained Earnings [Member]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	1,641,720	13,101,666	14,351,424	12,334,783
Net Income (Loss) Attributable to Parent	(11,459,946)	(1,249,758)	2,016,641
Payments for Repurchase of Common Stock		0	0
Proceeds from Stock Options Exercised	0	0	0
Treasury Stock [Member]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	(4,219,502)	(3,987,869)	(3,145,204)	(1,768,135)
Net Income (Loss) Attributable to Parent	0	0	0
Payments for Repurchase of Common Stock		858,359	1,262,169
Deferred Compensation Arrangement with Individual, Fair Value of Shares Issued		59,898
Proceeds from Stock Options Exercised	(102,469)	(44,204)	(114,900)
Accumulated Other Comprehensive Income (Loss) [Member]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	(73,014)	(205,953)	(153,916)	724,150
Net Income (Loss) Attributable to Parent	0	0	0
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax		(25,001)	(103,056)
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax		56,456	3,611
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax		(83,492)	(778,621)
Payments for Repurchase of Common Stock		0	0
Proceeds from Stock Options Exercised	0	0	0
Common Stock [Member]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	53,450	52,861	52,669	51,246
Net Income (Loss) Attributable to Parent	0	0	0
Payments for Repurchase of Common Stock		0	0
Deferred Compensation Arrangement with Individual, Shares Issued	6,000	3,900	1,800
Deferred Compensation Arrangement with Individual, Fair Value of Shares Issued	60	39	18
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	52,924	15,308	140,504
Proceeds from Stock Options Exercised	$ 529	$ 153	$ 1,405
Common Stock, Shares, Outstanding	5,345,008	5,286,084	5,266,876	5,124,572