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Commitments and Contingencies Line of Credit (Details) (Line of Credit [Member], USD $)
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1 Months Ended | ||||
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Dec. 31, 2010
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Mar. 31, 2010
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Mar. 31, 2009
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Sep. 30, 2012
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Dec. 31, 2011
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Line of Credit [Member]
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| Line of Credit Facility [Line Items] | |||||
| Line of Credit Facility, Maximum Borrowing Capacity | $ 1,500,000 | ||||
| Line of Credit, Number of Monthly Payments | 30 months | 30 months | 30 months | ||
| Debt Instrument, Interest Rate, Stated Percentage | 6.50% | 7.50% | 9.00% | ||
| Line of Credit Facility, Increase in Maximum Borrowing Capacity | 1,000,000 | 775,000 | |||
| Line of Credit Facility, Amount Outstanding | 312,000 | 892,000 | |||
| Line of Credit Facility, Remaining Borrowing Capacity | $ 937,000 | ||||