Summary of Significant Accounting Policies (Intangibles) (Details) (USD $)	12 Months Ended							12 Months Ended						12 Months Ended										12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2012 Minimum	Sep. 30, 2012 Maximum	Sep. 30, 2012 Non-compete agreements	Sep. 30, 2011 Non-compete agreements	Sep. 30, 2012 Non-compete agreements Minimum	Sep. 30, 2012 Non-compete agreements Maximum	Sep. 30, 2012 Customer lists	Sep. 30, 2011 Customer lists	Sep. 30, 2012 Technology	Sep. 30, 2011 Technology	Sep. 30, 2012 Technology Minimum	Sep. 30, 2012 Technology Maximum	Sep. 30, 2012 Licenses	Sep. 30, 2011 Licenses	Sep. 30, 2012 In-process research and development		Sep. 30, 2011 In-process research and development		Sep. 30, 2012 Other	Sep. 30, 2011 Other	Sep. 30, 2012 Other Minimum	Sep. 30, 2012 Other Maximum	Feb. 18, 2011 Kingstone Holding Company	Feb. 18, 2011 Kingstone Holding Company Non-compete agreements	Feb. 18, 2011 Kingstone Holding Company In-process research and development	Feb. 18, 2011 Kingstone Semiconductor Company Ltd
Acquired Finite and Indefinite-Lived Intangible Assets [Line Items]
Standard Product Warranty, Period				12 months	24 months
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months	$ 700,000
Finite-Lived Intangible Assets, Amortization Expense, Year Two	700,000
Finite-Lived Intangible Assets, Amortization Expense, Year Three	500,000
Finite-Lived Intangible Assets, Amortization Expense, Year Four	400,000
Finite-Lived Intangible Assets, Amortization Expense, Year Five	200,000
Finite-Lived Intangible Assets, Amortization Expense, after Year Five	1,600,000
Business Acquisition, Percentage of Voting Interests Acquired																										55.00%
Business Acquisition, Percentage of Voting Interests Acquired of Acquiree Owned Subsidiary																													100.00%
Acquired Finite-lived Intangible Asset, Amount																										3,200,000	900,000	1,600,000
Amortization of Intangible Assets	700,000	800,000	400,000
Useful Life (in years)								4 years	8 years	10 years				5 years	10 years	10 years								2 years	10 years
Intangible assets, finite and indefinite lived, gross	6,151,000	6,575,000				1,057,000	1,066,000			828,000	876,000	2,341,000	2,436,000			0	500,000	1,600,000	[1]	1,600,000	[1]	325,000	97,000
Accumulated amortization	(2,055,000)	(1,554,000)
Intangible assets, finite and indefinite lived, net	$ 4,096,000	$ 5,021,000

[1] (1) The in-process research and development will be amortized over its useful life when it has reached technological feasibility.