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Stock Option Plans (Details Textual) (USD $)
12 Months Ended 12 Months Ended 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Plan 2011 [Member]
Jun. 10, 2011
Plan 2011 [Member]
Dec. 31, 2013
Plan 2006 [Member]
Dec. 31, 2006
Plan 2006 [Member]
Jun. 09, 2006
Plan 2006 [Member]
Dec. 31, 2013
Plan 1995 [Member]
Sep. 29, 1995
Plan 1995 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized       250,000     600,000   900,000
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period     10 years     10 years      
Share-based Compensation Arrangement by Share-based Payment Award, Purchase Price of Common Stock, Percent     100.00%     100.00%      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number, Beginning Balance         491,500     215,000  
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Date         Jan. 02, 2019     Dec. 16, 2015  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit $ 2.40                
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit $ 6.00                
Share Based Compensation Arrangement By Share Based Payment Award Stock Options Outstanding Weighted Average Exercise Price $ 4.91 $ 4.83              
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term 3 years 4 years