Commitments and contingencies (Tables)

12 Months Ended

Dec. 31, 2018

Commitments and contingencies

Future annual minimum lease payments

Future annual minimum lease payments at December 31, 2018 are as follows:

	Total Minimum
	Lease Payments
	(in thousands)
2019		4,325
2020		4,731
2021		4,863
2022		5,001
2023		5,141
2024+		16,783
	$	40,844

Allocable arrangement consideration allocation

Unit of Accounting	Amount
	(in thousands)
Research and Development Services for:
Huntington’s Program	$	14,228
Parkinson’s Program		6,040
Friedreich’s ataxia Program		14,821
Spinal Muscular Atrophy Program		29,116
Future Program		2,239
Committee Obligations:
AJSC		133
DAC		207
PD Material Right		7,855
Total	$	74,639

Schedule of allocation of transaction price

Performance Obligation	Amount
	(in thousands)
Research Services	$	34,482
First Development Option Material Right		34,518
Total	$	69,000