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Note Payable - Square 1 Bank (Square 1 Bank Loan [Member])
3 Months Ended
Mar. 31, 2015
Square 1 Bank Loan [Member]
 
Note Payable [Line Items]  
Debt Disclosure [Text Block]
8.
Note Payable - Square 1 Bank
 
On August 31, 2012, as amended on July 26, 2013, the Company entered into a Loan and Security Agreement (the “Loan and Security Agreement” ) with Square 1 Bank (the “Lender”) pursuant to which the Lender agreed to extend credit facilities to the Company.
 
On November 18, 2014, the Company paid in full its existing credit facility with the Lender under the Loan and Security Agreement. The Company recorded amortization expense in the amount of $42,000 to write-off the remaining unamortized debt issuance costs during the year ended December 31, 2014.