Capital Leases, Future Minimum Payments Due In Five Years And Thereafter

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Term of the lessee's capital leasing arrangement, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Represents the amount of required minimum rental payments maturing in the fifth fiscal year following the latest fiscal year and thereafter for operating leases having an initial or remaining noncancelable letter-term in excess of one year.

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Area of a real estate property.

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Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal through the balance sheet date.

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Amount of minimum lease payments for capital leases.

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Amount of minimum lease payments for capital leases due in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of minimum lease payments for capital leases due in the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of minimum lease payments for capital leases due in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of minimum lease payments for capital leases due in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Amount of lessee's undiscounted obligation for lease payments for operating lease, due in fifth fiscal year following latest fiscal year.

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Amount of lessee's undiscounted obligation for lease payments for operating lease, due in fourth fiscal year following latest fiscal year.

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Amount of lessee's undiscounted obligation for lease payments for operating lease, due in third fiscal year following latest fiscal year.

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Amount of lessee's undiscounted obligation for lease payments for operating lease, due in second fiscal year following latest fiscal year.

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Amount of lessee's undiscounted obligation for lease payments for operating lease having an initial or remaining lease term in excess of one year due in remainder of fiscal year following latest fiscal year.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount of required minimum rental payments for leases having an initial or remaining non-cancelable letter-terms in excess of one year.

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Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income.

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Leases (Details) $ in Thousands	12 Months Ended
Leases (Details) $ in Thousands	Dec. 31, 2018 USD ($) ft²	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Mar. 31, 2019 USD ($)
Minimum lease payments
2019	$ 6,244
2020	4,063
2021	3,560
2022	3,371
2023 and beyond	13,649
Total	30,887
Rent expense, including fees for utilities and common area maintenances	5,700	$ 3,900	$ 3,500
Minimum \| Forecast
Minimum lease payments
Future lease payments, 2019				$ 1,500
Future lease payments, 2020				1,500
Future lease payments, 2021				1,500
Future lease payments, 2022				1,500
Future lease payments, 2023				1,500
Maximum \| Forecast
Minimum lease payments
Future lease payments, 2019				6,100
Future lease payments, 2020				6,000
Future lease payments, 2021				6,000
Future lease payments, 2022				6,000
Future lease payments, 2023				$ 6,000
Equipment
Capital Leases
Capital lease obligation	200		$ 900
2019	194
2020	60
2021	47
2022	30
2023 and beyond	0
Total principal obligation	$ 331
Equipment \| Minimum
Capital Leases
Fixed interest rate		5.00%	2.00%
Term of capital lease		36 months	36 months
Equipment \| Maximum
Capital Leases
Fixed interest rate		7.00%	5.70%
Term of capital lease		48 months	48 months
Cranbury, New Jersey \| Office and laboratory
Operating Leased Assets [Line Items]
Area of space leased (in square feet) \| ft²	90,000
United Kingdom \| Office
Operating Leased Assets [Line Items]
Area of space leased (in square feet) \| ft²	46,617
Princeton, New Jersey \| Office
Operating Leased Assets [Line Items]
Area of space leased (in square feet) \| ft²	21,922