Business Combinations (Schedule of Preliminary Allocation of Purchase Price) (Details) (USD $)	3 Months Ended		6 Months Ended				6 Months Ended		6 Months Ended		6 Months Ended
	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2014 HomeLink®	Dec. 31, 2013 HomeLink®	Sep. 30, 2013 HomeLink®	Sep. 27, 2013 HomeLink®	Mar. 31, 2014 HomeLink Trade Names and Trademarks HomeLink®	Sep. 30, 2013 HomeLink Trade Names and Trademarks HomeLink®	Mar. 31, 2014 Exclusive Licensing Agreement HomeLink®	Sep. 30, 2013 Exclusive Licensing Agreement HomeLink®	Mar. 31, 2014 Homelink Technology HomeLink®	Sep. 30, 2013 Homelink Technology HomeLink®	Mar. 31, 2014 Existing Customer Platforms HomeLink®	Sep. 30, 2013 Existing Customer Platforms HomeLink®
Business Acquisition [Line Items]
Prepaid Service Agreement Costs			$ 0		$ 3,383,000
Prepaid Service Agreement Costs, Other Adjustments			(3,383,000)
Personal Property			8,114,600		4,430,986
Personal Property, Fair Value Adjustments			3,683,614
Real Property			1,060,000		1,060,000
Indefinite-lived intangible assets							52,000,000	47,000,000	96,000,000	87,000,000
Finite-lived intangibles											180,000,000	166,000,000	43,000,000	43,000,000
Intangible Assets, Fair Value Adjustments							5,000,000		9,000,000		14,000,000
Accounts Receivable			11,119,447		7,719,302
Accounts Receivable, Other Adjustments			3,400,145
Net Customer Tooling			983,406		956,665
Net Customer Tooling, Other Adjustments			26,741
Fair Value of Acquired Assets			392,277,453		360,549,953
Fair Value of Acquired Assets, Fair Value Adjustments			31,683,614
Fair Value of Acquired Assets, Other Adjustments			43,886
Other adjustments			(1,492,398)
Other adjustments, Other Adjustments			(1,492,398)
Goodwill	307,365,845	307,365,845	307,365,845	307,365,845	337,557,061	337,600,000
Goodwill, Fair Value Adjustments	0		(31,683,614)
Goodwill, Other Adjustments			(1,492,398)
Total Cash Consideration			698,150,900		698,107,014
Total Cash Consideration, Fair Value Adjustments			0
Total Cash Consideration, Other Adjustments			$ 43,886