Revenue From Contracts With Customers - Unbilled Receivables (Details) $ in Thousands	9 Months Ended
Sep. 30, 2020 USD ($)
Unbilled Revenues
Unbilled receivables at December 31, 2019	$ 11,815
Recognition of unbilled receivables	91,024
Revenue billed to customer	(93,210)
Unbilled receivables at September 30, 2020	9,629
New Venture
Unbilled Revenues
Unbilled receivables at December 31, 2019	5,222
Unbilled receivables at September 30, 2020	4,144
Imaging and Reservoir Services
Unbilled Revenues
Unbilled receivables at December 31, 2019	6,539
Unbilled receivables at September 30, 2020	3,705
Devices
Unbilled Revenues
Unbilled receivables at December 31, 2019	54
Unbilled receivables at September 30, 2020	$ 1,780

Amount, after allowance for credit loss, of right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 8
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130549-203045

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=121556615&loc=SL49130531-203044

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 45
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=121556615&loc=SL49130533-203044

Name:	us-gaap_ContractWithCustomerAssetNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant