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Long term obligations (Details Textual) (USD $)
6 Months Ended 3 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Mar. 31, 2014
Vendor Agreement [Member]
Mar. 31, 2014
Sale Leaseback Agreement [Member]
Debt Instrument [Line Items]        
License Costs     $ 400,000  
Capital Lease Obligations Lease Period       36 months
Sale Leaseback Transaction, Imputed Interest Rate       6.00%
Proceeds from Long-term Capital Lease Obligations 859,000 0   900,000
Sale Leaseback Transaction, Rent Expense $ 100,000