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Discontinued Operations (Details) (USD $)
Jun. 30, 2012
Dec. 31, 2011
Dec. 31, 2010
Assets and liabilities classified as discontinued operations on the consolidated balance sheets      
Accounts receivable, net   $ 188,439 $ 229,891
Inventory 271,000 266,347 258,939
Prepaid expenses   42,667 62,028
Current assets of discontinued operations   497,453 550,858
Accounts payable   11,855 36,224
Accrued expenses   7,782 4,909
Current liabilities of discontinued operations   $ 19,637 $ 41,133