Subsequent event (Details) $ in Thousands	May 07, 2020 USD ($)
Subsequent event
Subsequent event
Reduction in future minimum lease payments due to early termination	$ 180

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

No definition available.

Name:	us-gaap_SubsequentEventLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration