Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045

Name:	us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Revenue From Contracts with Customers - Disaggregation of Revenues (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Jun. 30, 2019
Disaggregation of Revenue [Line Items]
Revenues	$ 38,494	$ 60,358
Dayrate drilling
Disaggregation of Revenue [Line Items]
Revenues	34,478	56,451
Mobilization
Disaggregation of Revenue [Line Items]
Revenues	1,541	1,260
Reimbursables
Disaggregation of Revenue [Line Items]
Revenues	2,448	1,604
Early termination
Disaggregation of Revenue [Line Items]
Revenues	27	0
Capital modification
Disaggregation of Revenue [Line Items]
Revenues	0	10
Intangible
Disaggregation of Revenue [Line Items]
Revenues	$ 0	$ 1,033	$ 1,000