Annual report pursuant to Section 13 and 15(d)

Reportable Segments - Results of Operations by Reportable Segment (Details)

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Reportable Segments - Results of Operations by Reportable Segment (Details) - USD ($)
3 Months Ended 9 Months Ended 12 Months Ended
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2018
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2019
Dec. 31, 2018
Revenues:                    
Revenues       $ 157,397,000         $ 472,395,000 $ 480,821,000
Operating income:                    
Total operating gross margin $ 11,462,000 $ 22,268,000 $ 22,991,000 11,424,000 $ 3,815,000 $ 1,932,000 $ (167,000) $ (10,408,000) 56,721,000 (4,828,000)
General and administrative expense       (8,147,000)         (17,967,000) (24,545,000)
Loss on impairment       0         0 (50,698,000)
Gain (loss) on disposition of assets, net       384,000         226,000 (1,724,000)
Pre-petition restructuring charges       0         0 (21,820,000)
Reorganization Items       (92,977,000)         (1,173,000) (9,789,000)
Total operating income (loss) 5,459,000 15,982,000 16,366,000 (89,316,000) (31,661,000) (56,544,000) (8,933,000) (16,266,000) 37,807,000 (113,404,000)
Interest expense       (274,000)         (20,902,000) (42,565,000)
Interest income       8,000         887,000 91,000
Other       (10,000)         (188,000) (2,023,000)
Income (loss) before income taxes       (89,592,000)         17,604,000 (157,901,000)
Revenues 156,281,000 $ 160,083,000 $ 156,031,000 157,397,000 129,148,000 $ 123,395,000 $ 118,603,000 $ 109,675,000 472,395,000 480,821,000
Capital expenditures:                    
Total capital expenditures       9,231,000         71,107,000 70,567,000
Depreciation and amortization:                    
Total depreciation and amortization       25,102,000         61,499,000 107,545,000
Identifiable assets:                    
Total assets 682,848,000       828,414,000       682,848,000 828,414,000
Operating Segments                    
Identifiable assets:                    
Total assets 602,603,000       759,733,000       602,603,000 759,733,000
Corporate                    
Capital expenditures:                    
Total capital expenditures       42,000         1,070,000 859,000
Depreciation and amortization:                    
Total depreciation and amortization       2,337,000         572,000 8,441,000
Identifiable assets:                    
Total assets 80,245,000       68,681,000       80,245,000 68,681,000
Drilling Services                    
Revenues:                    
Revenues       83,693,000         256,405,000 225,140,000
Operating income:                    
Total operating gross margin       (2,284,000)         14,034,000 (37,656,000)
U.S. (lower 48) drilling                    
Revenues:                    
Revenues       6,627,000         36,710,000 11,729,000
Operating income:                    
Total operating gross margin       (1,508,000)         2,189,000 (15,720,000)
U.S. (lower 48) drilling | Operating Segments                    
Capital expenditures:                    
Total capital expenditures       395,000         1,061,000 444,000
Depreciation and amortization:                    
Total depreciation and amortization       808,000         4,424,000 7,758,000
Identifiable assets:                    
Total assets 27,335,000       30,283,000       27,335,000 30,283,000
International & Alaska drilling                    
Revenues:                    
Revenues       77,066,000         219,695,000 213,411,000
Operating income:                    
Total operating gross margin       (776,000)         11,845,000 (21,936,000)
International & Alaska drilling | Operating Segments                    
Capital expenditures:                    
Total capital expenditures       1,199,000         7,787,000 7,444,000
Depreciation and amortization:                    
Total depreciation and amortization       8,464,000         20,164,000 36,072,000
Identifiable assets:                    
Total assets 255,844,000       366,856,000       255,844,000 366,856,000
Rental Tools Services                    
Revenues:                    
Revenues       73,704,000         215,990,000 255,681,000
Operating income:                    
Total operating gross margin       13,708,000         42,687,000 32,828,000
U.S. rental tools                    
Revenues:                    
Revenues       52,595,000         144,698,000 176,531,000
Operating income:                    
Total operating gross margin       17,289,000         38,054,000 44,512,000
U.S. rental tools | Operating Segments                    
Capital expenditures:                    
Total capital expenditures       4,429,000         51,539,000 55,545,000
Depreciation and amortization:                    
Total depreciation and amortization       11,715,000         30,912,000 48,167,000
Identifiable assets:                    
Total assets 221,383,000       216,123,000       221,383,000 216,123,000
International rental tools                    
Revenues:                    
Revenues       21,109,000         71,292,000 79,150,000
Operating income:                    
Total operating gross margin       (3,581,000)         4,633,000 (11,684,000)
International rental tools | Operating Segments                    
Capital expenditures:                    
Total capital expenditures       3,166,000         9,650,000 6,275,000
Depreciation and amortization:                    
Total depreciation and amortization       $ 4,115,000         5,999,000 15,548,000
Identifiable assets:                    
Total assets $ 98,041,000       $ 146,471,000       $ 98,041,000 $ 146,471,000
Customer Concentration Risk | Sales Revenue, Net | Exxon Neftegas Limited (ENL)                    
Operating income:                    
Percentage of revenue from major customer       31.20%         29.30% 25.70%
Customer Concentration Risk | Sales Revenue, Net of Reimbursable Revenues | Exxon Neftegas Limited (ENL)                    
Operating income:                    
Percentage of revenue from major customer                 18.60% 17.90%
Reimbursable revenue                    
Operating income:                    
Revenues       $ 28,541,000         $ 70,174,000 $ 54,620,000
Reimbursable revenue | Exxon Neftegas Limited (ENL)                    
Operating income:                    
Revenues       $ 26,300,000         $ 63,200,000 $ 47,200,000
Reimbursable revenue | Customer Concentration Risk | Sales Revenue, Net | Exxon Neftegas Limited (ENL)                    
Operating income:                    
Percentage of revenue from major customer       17.70%            
International & Alaska drilling | Exxon Neftegas Limited (ENL)                    
Operating income:                    
Percentage of revenue from major customer       63.80%            
International & Alaska drilling | Customer Concentration Risk | Sales Revenue, Net | Exxon Neftegas Limited (ENL)                    
Operating income:                    
Percentage of revenue from major customer                 62.90% 58.00%
International & Alaska drilling | Customer Concentration Risk | Sales Revenue, Net of Reimbursable Revenues | Exxon Neftegas Limited (ENL)                    
Operating income:                    
Percentage of revenue from major customer                 48.80% 48.00%
International & Alaska drilling | Reimbursable revenue | Exxon Neftegas Limited (ENL)                    
Operating income:                    
Percentage of revenue from major customer       46.60%