Quarterly report pursuant to Section 13 or 15(d)

Nature Of Business Summary Of Significant Accounting Policies - Cash and cash equivalents (Details)

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Nature Of Business Summary Of Significant Accounting Policies - Cash and cash equivalents (Details) (USD $)
Jun. 30, 2012
Dec. 31, 2011
Jun. 30, 2011
Dec. 31, 2010
Notes to Financial Statements        
Cash balance in excess of FDIC limits $ 21,029,000      
Cash 1,211,000 1,135,000    
Money market fund 20,068,000 19,526,000    
Total cash and cash equivalents $ 21,279,000 $ 20,661,000 $ 21,822,000 $ 21,348,000