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Debt (Details) (USD $)
3 Months Ended 3 Months Ended 6 Months Ended
Mar. 31, 2014
Dec. 31, 2013
Jun. 30, 2013
Jun. 30, 2013
Loan and security agreement
Mar. 31, 2014
Term loan
Jun. 30, 2013
Term loan
installment
Debt            
Maximum borrowing capacity       $ 10,000,000    
Amount drawn down     5,000,000     5,000,000
Amount not drawn         5,000,000  
Number of installments           30
Period after which debt is repayable           18 months
Interest rate (as a percent)           6.06%
Prepayment penalties for prepayment within one year of the loan origination (as a percent)           2.25%
Prepayment penalties for prepayment within two years of the loan origination (as a percent)           1.50%
Prepayment penalties for prepayment after two years of the loan origination (as a percent)           0.75%
Net debt obligation         4,900,000  
Borrowing         5,000,000  
Debt discount         100,000  
Net debt obligation included in current liabilities 467,000       467,000  
Net debt obligation included in long-term debt 4,467,000 4,899,000     4,500,000  
Amount of end of term payment           223,000
End of term payment as a percentage of total outstanding principal balance           4.45%
Interest on the debt 20,000       111,000  
Nominal interest on the debt excluding amortization of debt discount and accretion         76,000  
Amortization of debt discount and accretion of end of term payment         $ 35,000