Employee benefit plans	6 Months Ended
Jun. 30, 2020
Employee benefit plans
Employee benefit plans	14. Employee benefit plans The Company sponsors a 401(k) savings plan for its employees. The Company may make discretionary contributions for each 401(k) plan year. During the three and six months ended June 30, 2020, the Company made contributions of $0.2 million and $0.3 million, respectively. During three and six months ended June 30, 2019, the Company made contributions of $0.1 million and $0.3 million, respectively.

The entire disclosure for pension and other postretirement benefits.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-URI http://asc.fasb.org/topic&trid=2235017

Name:	us-gaap_PensionAndOtherPostretirementBenefitsDisclosureTextBlock
Namespace Prefix:	us-gaap_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration