Restructuring Charges and RIght of Use Asset Impairments	6 Months Ended
Jun. 29, 2019
Restructuring and Related Activities [Abstract]
Restructuring Charges and RIght of Use Asset Impairments	Restructuring Charges and Right of Use Asset Impairments During the quarter ended September 30, 2017, we ceased use of 25,812 square feet of our 108,743 square foot headquarters facility in Waltham, Massachusetts. We recorded a lease obligation charge of $3.1 million. The lease obligation charge comprised of restructuring expense, including sublease income and construction costs, net of deferred rent liabilities of $2.6 million. Additionally, we wrote off $0.5 million of leasehold improvements related to the space. These estimates may vary from the sublease agreements ultimately executed, if at all, resulting in an adjustment to the charges. The initial restructuring charge was recorded as restructuring expense in the consolidated statements of operations for the three and nine months ended September 30, 2017. In the first quarter of fiscal 2018, we updated our assumptions, as we had signed a sublease agreement for a portion of the ceased use space and updated our estimates for the expected time period it will take to obtain a subtenant for the remainder of the ceased use space. This resulted in an additional $0.5 million of restructuring charges in the first quarter of fiscal 2018. During the three months ended September 29, 2018, we again updated our estimate for the expected time it will take to obtain a subtenant for the remainder of the ceased use space, resulting in an additional $0.1 million of restructuring charges in the third quarter of fiscal 2018. Upon adoption of ASC 842, we reclassified the restructuring liability from liabilities to a reduction of the right of use asset associated with the lease. Additionally, during the three and six months ended March 30 2019 and June 29, 2019, we again updated our assumptions, as we had signed a sublease agreement for the remaining portion of the ceased use space, resulting in an additional $0.2 million and $0.3 million of charges in the first and second quarters of fiscal 2019, respectively. During the quarter ended June 29, 2019, we decided to abandon and seek a sublet for 36,395 square feet of our 108,743 square foot headquarters facility in Waltham, Massachusetts. We recorded a right of use asset impairment charge of $1.1 million. This loss was determined by comparing the fair value of impacted right of use asset to the carrying value of the asset of the impairment measurement date, as required under ASC 360. The fair value of the right of use asset was based on the estimated sublease income for the portion of the Company’s headquarters taking into consideration the time period it will take to obtain a subtenant, the applicable discount rate and the sublease rate. Additionally, we had a restructuring loss of $0.7 million associated with abandoning the space. The loss comprised of exit and disposal costs consisting of construction costs, real estate taxes, broker fees and utilities. Furthermore, we wrote-off $0.5 million of leasehold improvements related to the space. These estimates may vary from the sublease agreements ultimately executed, if at all, resulting in an adjustment to the charges. The initial restructuring charge was recorded as restructuring and right of use impairment charges in the consolidated statements of operations for the three and six months ended June 29, 2019.

Restructuring Charges and Right of Use Asset Impairments

During the quarter ended September 30, 2017, we ceased use of 25,812 square feet of our 108,743 square foot headquarters facility in Waltham, Massachusetts. We recorded a lease obligation charge of $3.1 million. The lease obligation charge comprised of restructuring expense, including sublease income and construction costs, net of deferred rent liabilities of $2.6 million. Additionally, we wrote off $0.5 million of leasehold improvements related to the space. These estimates may vary from the sublease agreements ultimately executed, if at all, resulting in an adjustment to the charges. The initial restructuring charge was recorded as restructuring expense in the consolidated statements of operations for the three and nine months ended September 30, 2017. In the first quarter of fiscal 2018, we updated our assumptions, as we had signed a sublease agreement for a portion of the ceased use space and updated our estimates for the expected time period it will take to obtain a subtenant for the remainder of the ceased use space. This resulted in an additional $0.5 million of restructuring charges in the first quarter of fiscal 2018. During the three months ended September 29, 2018, we again updated our estimate for the expected time it will take to obtain a subtenant for the remainder of the ceased use space, resulting in an additional $0.1 million of restructuring charges in the third quarter of fiscal 2018. Upon adoption of ASC 842, we reclassified the restructuring liability from liabilities to a reduction of the right of use asset associated with the lease. Additionally, during the three and six months ended March 30 2019 and June 29, 2019, we again updated our assumptions, as we had signed a sublease agreement for the remaining portion of the ceased use space, resulting in an additional $0.2 million and $0.3 million of charges in the first and second quarters of fiscal 2019, respectively.

During the quarter ended June 29, 2019, we decided to abandon and seek a sublet for 36,395 square feet of our 108,743 square foot headquarters facility in Waltham, Massachusetts. We recorded a right of use asset impairment charge of $1.1 million. This loss was determined by comparing the fair value of impacted right of use asset to the carrying value of the asset of the impairment measurement date, as required under ASC 360. The fair value of the right of use asset was based on the estimated sublease income for the portion of the Company’s headquarters taking into consideration the time period it will take to obtain a subtenant, the applicable discount rate and the sublease rate. Additionally, we had a restructuring loss of $0.7 million associated with abandoning the space. The loss comprised of exit and disposal costs consisting of construction costs, real estate taxes, broker fees and utilities. Furthermore, we wrote-off $0.5 million of leasehold improvements related to the space. These estimates may vary from the sublease agreements ultimately executed, if at all, resulting in an adjustment to the charges. The initial restructuring charge was recorded as restructuring and right of use impairment charges in the consolidated statements of operations for the three and six months ended June 29, 2019.