Revenue from Contracts with Customers (Tables)

9 Months Ended

Sep. 30, 2018

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue

The following table summarizes revenues from our contracts disaggregated by revenue generating activity contained therein for the three and nine months ended September 30, 2018 and 2017:

	Three Months Ended September 30,				Nine Months Ended September 30,
(in thousands)	2018		2017		2018		2017
Dayrate drilling	$	27,552	$	22,125	$	75,776	$	61,369
Mobilization	331		619		1,061		1,586
Reimbursables	555		700		2,788		2,001
Capital modification	1		—		195		—
Other	—		1		—		10
Total revenue	$	28,439	$	23,445	$	79,820	$	64,966

Summary of Contract with Customer, Asset and Liability

The following table provides information about receivables, contract assets and contract liabilities related to contracts with customers:

(in thousands)	September 30, 2018			December 31, 2017
Receivables, which are included in "Accounts receivable, net"	$	23,879		$	18,028
Contract assets	$	—		$	—
Contract liabilities	$	(1,267	)	$	(836	)

Significant changes in contract assets and contract liabilities balances during the period are as follows:

	Three Months Ended   September 30, 2018					Nine Months Ended   September 30, 2018
(in thousands)	Contract Assets		Contract Liabilities			Contract Assets		Contract Liabilities
Revenue recognized that was included in contract liabilities at beginning of period	$	—	$	34		$	—	$	730
Increase in contract liabilities due to cash received, excluding amounts recognized as revenue	$	—	$	(868	)	$	—	$	(1,163	)
Transferred to receivables from contract assets at beginning of period	$	—	$	—		$	—	$	—

Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction

The following table includes estimated revenue expected to be recognized in the future related to performance obligations that are unsatisfied (or partially unsatisfied) as of September 30, 2018. The estimated revenue does not include amounts of variable consideration that are constrained.

	Year Ending December 31,
(in thousands)	2018		2019		2020		Total
Revenue	$	428	$	839	$	—	$	1,267