Commitments and Contingencies Lease Commitments We have commitments under operating leases for our facilities that expire on various dates through 2026, including the Waltham lease arrangement discussed in Note 2. Total lease expense, net of sublease income, for the three and nine months ended March 31, 2018 was $4,340 and $10,527 , respectively and $2,860 and $9,152 for the three and nine months ended March 31, 2017 , respectively. We lease certain machinery and plant equipment under both capital and operating lease agreements that expire at various dates through 2027. The aggregate carrying value of the leased buildings and equipment under capital leases included in property, plant and equipment, net in our consolidated balance sheet at March 31, 2018 , is $35,253 , net of accumulated depreciation of $36,022 ; the present value of lease installments not yet due included in other current liabilities and other liabilities in our consolidated balance sheet at March 31, 2018 amounts to $31,979 . Purchase Obligations At March 31, 2018 , we had unrecorded commitments under contract of $55,245 including commitments for third-party web services of $21,000 . In addition, we had purchase commitments for production and computer equipment purchases of approximately $7,571 , inventory purchase commitments of $1,984 , commitments for advertising campaigns of $2,698 , professional and consulting fees of $2,680 , and other unrecorded purchase commitments of $19,312 . Other Obligations We have an outstanding installment obligation of $2,806 related to the fiscal 2012 intra-entity transfer of the intellectual property of our subsidiary Webs, Inc., which results in tax being paid over a 7.5 year term and has been classified as a deferred tax liability in our consolidated balance sheet as of March 31, 2018 . In addition, we have deferred payments related to our other acquisitions of $3,864 in aggregate. Legal Proceedings We are not currently party to any material legal proceedings. Although we cannot predict with certainty the res