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Restricted Cash (Details) (USD $)
12 Months Ended 0 Months Ended
Dec. 31, 2012
Jun. 30, 2013
Dec. 31, 2011
Jan. 11, 2013
HP [Member]
Restricted Cash (Textual)        
Letter of Credit from JP Morgan Chase Bank       $ 200,000
Letter of credit facility from JP Morgan Chase Bank, expiration date       Jan. 31, 2014
Letter of credit increased amount       270,000
Cash collateral guarantee for monthly credit line 105.00%      
Credit line, monthly borrowing capacity 100,000     200,000
Description of collateral fee 105% of the monthly credit line of $100,000      
Description of collateral guarantee Cash collateral guarantee of 105% of the monthly credit line of $100,000 in a certificate of deposit for twelve months as collateral.      
Restricted cash $ 105,000 $ 375,211