Commitments and contingencies (Tables)

12 Months Ended

Dec. 31, 2018

Commitments and Contingencies Disclosure [Abstract]

Schedule of Minimum Lease Payments Under Non-cancelable Operating Leases

The minimum lease payments under the non-cancelable operating leases are payable in the following amounts over the following years.

	2019		2020		2021		Total
Operating lease obligations	$	362	$	336	$	280	$	978
	$	362	$	336	$	280	$	978