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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 |  |  |
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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 |  |  |  |  |  |  |  |  |  |  |

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- Definition Amount due from customers or clients for goods or services, including trade receivables, that have been delivered or sold in the normal course of business, and amounts due from others, including related parties expected to be converted to cash, sold or exchanged within one year or the normal operating cycle, if longer, acquired at the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6910749&loc=d3e4845-128472 + Details
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- Definition The amount of property, plant, and equipment recognized as of the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6910749&loc=d3e4845-128472 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 55 -Paragraph 37 -URI http://asc.fasb.org/extlink&oid=25498275&loc=d3e2207-128464 + Details
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