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Long-term Debt - Components of interest expense (Details 1) (Convertible Notes Payable, USD $)
In Thousands, unless otherwise specified
 3 Months Ended 6 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2013
Dec. 31, 2012
Convertible Notes Payable
        
Debt Instrument [Line Items]        
Coupon interest $ 1,594 $ 1,594 $ 3,188 $ 3,188
Non-cash amortization of discount 3,409 3,185 6,769 6,325
Amortization of issuance costs 205 205 410 410
Total $ 5,208 $ 4,984 $ 10,367 $ 9,923