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Summary of Significant Accounting Policies (Details Textual) (USD $)
3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Dec. 31, 2012
Share-based Compensation (Textual) [Abstract]      
Maturity of highly liquid debt instruments 3 months    
Uncollectible $ 0   $ 0
Allowance for doubtful accounts 0   0
Inventories, net of reserve 459,000   538,000
Forfeiture Allocation $ 0 $ 0