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Convertible Notes (Details) (Convertible Notes, USD $)
1 Months Ended
Apr. 30, 2013
D
Convertible Notes
 
Convertible notes  
Amount of debt issued $ 20,000,000
Accrued interest rate of debt (as a percent) 7.50%
Conversion price (in dollars per share) $ 10.875
Number of trading days for which average volume-weighted closing stock price must exceed specified price 20
Number of consecutive trading days during which average volume-weighted closing stock price must exceed specified price 30 days
Market price at which the Company has the right to convert the entire outstanding principal of the Convertible notes $ 16.31
Convertible notes voting restriction period 3 years
Debt issuance costs $ 300,000