Operating leases (Tables)

12 Months Ended

Dec. 31, 2019

Operating leases

Schedule of aggregate future minimum annual rental commitments under non-cancelable lease agreements

Aggregate future minimum annual rental commitments under these non‑cancelable lease agreements are as follows at December 31, 2019 (in thousands):

Year ending December 31,
2020	$	864
2021		876
2022		590
2023		—
2024		—
Thereafter		—
	$	2,330