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Discontinued Operations (Tables)
 6 Months Ended
Jun. 30, 2017
Discontinued Operations and Disposal Groups [Abstract]  
Summary of financial information has been segregated from continuing operations
The following summarized financial information has been segregated from continuing operations and reported as Discontinued Operations for the three and six months ended June 30, 2017 and 2016 (in thousands):
 
Three months ended June 30,
 
Six months ended June 30,
 
2017
 
2016
 
2017
 
2016
Drilling Technologies
 
 
 
 
 
 
 
Revenue
$
4,737

 
$
6,372

 
$
11,534

 
$
12,829

Cost of revenue
(2,603
)
 
(4,155
)
 
(7,259
)
 
(9,587
)
Selling, general and administrative
(2,740
)
 
(3,495
)
 
(5,771
)
 
(8,155
)
Depreciation and amortization
—

 
(337
)
 
—

 
(1,085
)
Research and development
(6
)
 
(22
)
 
(6
)
 
(65
)
Gain (loss) on disposal of long-lived assets
(12
)
 
19

 
62

 
16

Impairment of inventory and long-lived assets
—

 
—

 
—

 
(36,522
)
Loss from operations
(624
)
 
(1,618
)
 
(1,440
)
 
(42,569
)
Other expense
(46
)
 
(69
)
 
(117
)
 
(243
)
Loss on sale of businesses
(1,365
)
 
—

 
(1,365
)
 
—

Loss on write-down of assets held for sale
(272
)
 
—

 
(6,831
)
 
—

Loss before income taxes
(2,307
)
 
(1,687
)
 
(9,753
)
 
(42,812
)
Income tax benefit
158

 
456

 
3,147

 
14,881

Net loss from discontinued operations
$
(2,149
)
 
$
(1,231
)
 
$
(6,606
)
 
$
(27,931
)
 
 
 
 
 
 
 
 
Production Technologies
 
 
 
 
 
 
 
Revenue
$
849

 
$
1,868

 
$
4,002

 
$
3,889

Cost of revenue
(707
)
 
(1,882
)
 
(3,189
)
 
(3,793
)
Selling, general and administrative
(802
)
 
(897
)
 
(1,675
)
 
(2,051
)
Depreciation and amortization
—

 
(149
)
 
—

 
(298
)
Research and development
(92
)
 
(201
)
 
(363
)
 
(467
)
Loss on disposal of long-lived assets
—

 
—

 
—

 
(59
)
Impairment of inventory
—

 
—

 
—

 
(3,913
)
Loss from operations
(752
)
 
(1,261
)
 
(1,225
)
 
(6,692
)
Other expense
(16
)
 
(23
)
 
(52
)
 
(44
)
Gain on sale of businesses
171

 
—

 
171

 
—

Loss on write-down of assets held for sale
—

 
—

 
(9,718
)
 
—

Loss before income taxes
(597
)
 
(1,284
)
 
(10,824
)
 
(6,736
)
Income tax benefit
42

 
346

 
3,493

 
2,342

Net loss from discontinued operations
$
(555
)
 
$
(938
)
 
$
(7,331
)
 
$
(4,394
)
 
 
 
 
 
 
 
 
Drilling Technologies and Production Technologies
 
 
 
 
 
 
 
Loss from discontinued operations, net of tax
$
(2,704
)
 
$
(2,169
)
 
$
(13,937
)
 
$
(32,325
)

The assets and liabilities held for sale on the Consolidated Balance Sheets as of June 30, 2017 and December 31, 2016 are as follows (in thousands):
 
Drilling Technologies
 
Production Technologies
 
June 30, 2017
 
December 31, 2016
 
June 30, 2017
 
December 31, 2016
Assets:
 
 
 
 
 
 
 
Accounts receivable, net
$
2,448

 
$
5,072

 
$
539

 
$
1,784

Inventories
1,942

 
9,078

 
—

 
8,115

Other current assets
1,595

 
278

 
697

 
370

Long-term receivable
—

 
—

 
—

 
4,179

Property and equipment, net
880

 
11,277

 
—

 
3,978

Goodwill
—

 
15,333

 
—

 
1,689

Other intangible assets, net
—

 
7,395

 
—

 
484

Assets held for sale
6,865

 
48,433

 
1,236

 
20,599

Valuation allowance
(904
)
 
(18,971
)
 
—

 
(6,161
)
Assets held for sale, net
$
5,961

 
$
29,462

 
$
1,236

 
$
14,438

Liabilities:
 
 
 
 
 
 
 
Accounts payable
$
388

 
$
2,472

 
$
40

 
$
914

Accrued liabilities
1,607

 
1,190

 
381

 
385

Liabilities held for sale
$
1,995

 
$
3,662

 
$
421

 
$
1,299