Slicers (applies to each fact value in each table cell)

Reporting Entity [Axis]

0001100412 (http://www.sec.gov/CIK)

Debt Disclosure [Abstract]	Period [Axis]
	2015-07-01 - 2016-06-30
Debt Disclosure [Abstract]
Schedule of long-term debt	Long-term debt consists of the following (in thousands):   June 30,   2016   2015         Comerica term loan $ 14,550   $ 14,550 Convertible senior notes 132,250   132,250 Long-term debt, gross 146,800   146,800 Less: Unamortized debt discount and fees (33,145 )   (39,520 ) Long-term debt, net $ 113,655   $ 107,280
Schedule of interest expense	The following table shows the details of our interest expense for all of our debt arrangements outstanding during the periods presented, including contractual interest, and amortization of debt discount, debt issuance costs and loan transaction fees that were charged to interest expense (in thousands):   Year Ended June 30,   2016   2015   2014 Comerica Term Loan           Simple interest $ 501   $ 480   $ 479 Amortization of fees paid for letters of credit 31   44   48 Total interest expense on the Comerica term loan 532   524   527             Convertible Senior Notes           Contractual interest 3,967   3,968   3,979 Amortization of debt discount 6,033   5,447   4,932 Amortization of debt issuance costs 342   308   278 Total interest expense on the convertible senior notes 10,342   9,723   9,189 Total interest expense $ 10,874   $ 10,247   $ 9,716
Schedule of principal payments required for long-term debt	We are required to make principal payments for our long-term debt as follows during the fiscal years ending June 30 (in thousands):   Principal Due     2017 $ — 2018 14,550 2019 — 2020 132,250 2021 — Thereafter —   $ 146,800