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Commitments and Contingencies (Details Textual) (USD $)	3 Months Ended			12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Commitments and Contingencies (Additional Textual) [Abstract]
Net book value of assets held under capital leases	$ 0			$ 0	$ 52,000
Accumulated amortization cost	510,000			510,000	458,000
Outstanding borrowings under the credit facility	0			0
Amount borrowed against the facility	9,000,000	5,000,000	12,000,000
Present value of the net minimum lease payments	0			0
Rental expense under operating leases				4,500,000	4,700,000	3,500,000
Purchase commitments				103,300,000
Estimate of potential settlements on legal and indemnification matters	645,000			645,000
Borrowings under the facility interest rate	1.00%			1.00%
Cash equivalents and marketable securities held at bank	20,100,000			20,100,000
Company's borrowing limit under credit facility	$ 16,800,000			$ 16,800,000
September Fifteenth Two Thousand Eight [Member]
Commitments and Contingencies (Textual) [Abstract]
"Lawsuit" filed date				September 15, 2008
September Eighteenth Two Thousand Eight [Member]
Commitments and Contingencies (Textual) [Abstract]
"Lawsuit" filed date				September 18, 2008

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- Definition

Capital leased assets net book value.

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Cash equivalents and marketable securities held at bank.

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- Definition

Present value of minimum lease payments for capital leases net of executory costs, including amounts paid by the lessee to the lessor for insurance, maintenance and taxes.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 30

-Section 50

-Paragraph 1

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The total charge for the use of long-lived depreciable assets subject to a lease meeting the criteria for capitalization.

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Amount borrowed under the credit facility as of the balance sheet date.

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Maximum amount borrowed under the credit facility at any time during the period.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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The carrying amount as of the balance sheet date of the combined total of loss contingency liabilities.

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States the date the complaint was formally filed in a court of law, in arbitration or mediation.

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Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income.

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