Nature of operations and summary of significant accounting policies (Tables)

12 Months Ended

Dec. 31, 2019

Accounting Policies [Abstract]

Components of accounts receivable

Accounts receivable consisted of the following:

	December 31, 2019			December 31, 2018
Joint interests	$	16,664		$	31,573
Accrued commodity sales	30,819			30,287
Derivative settlements	717			2,092
Other	2,544			3,375
Allowance for doubtful accounts	(1,097		)	(1,240		)
	$	49,647		$	66,087

Components of inventory

Inventories consisted of the following:

	December 31, 2019			December 31, 2018
Equipment inventory	$	3,435		$	3,663
Commodities	474			574
Inventory valuation allowance	(179		)	(178		)
	$	3,730		$	4,059

Adjustments to oil and natural gas properties

We recorded ceiling adjustments to the oil and natural gas properties, for the periods disclosed below. The loss is reflected in “Impairment of oil and gas assets” in our consolidated statements of operations.

	Successor						Predecessor
					Period from		Period from
					March 22, 2017		January 1, 2017
	For the Year Ended December 31,				through		through
	2019		2018		December 31, 2017		March 21, 2017
Ceiling test impairment	$	430,695	$	20,065	$	42,146	$	—

Components of other expense

Other expense consisted of the following:

	Successor
					Period from
					March 22, 2017
	For the Year Ended December 31,				through
	2019		2018		December 31, 2017
Restructuring	$	—	$	425	$	3,531
Subleases	1,075		1,611		197
Total other expense	$	1,075	$	2,036	$	3,728

Components of cost reduction initiatives expense

The expense consists of costs for one-time severance and termination benefits in connection with our reductions in force and third party legal and professional services we have engaged to assist in our cost savings initiatives as follows:

	Successor				Predecessor
			Period from		Period from
	For the Year		March 22, 2017		January 1, 2017
	Ended December 31,		through		through
	2018		December 31, 2017		March 21, 2017
One-time severance and termination benefits	$	1,034	$	678	$	608
Professional fees	$	—	13		21
Total cost reduction initiatives expense	$	1,034	$	691	$	629