Segment Information (Schedule of Segment Reporting Information) (Details)	1 Months Ended	2 Months Ended	3 Months Ended	5 Months Ended	6 Months Ended
	Jun. 30, 2020 USD ($) drilling_rigs	May 31, 2020 USD ($)	Jun. 30, 2019 USD ($) drilling_rigs	May 31, 2020 USD ($)	Jun. 30, 2019 USD ($) drilling_rigs	Dec. 31, 2019 USD ($)
Segment Reporting Information [Line Items]
Revenues	$ 11,163,000	$ 28,048,000	$ 152,843,000	$ 142,370,000	$ 299,411,000
Operating costs	8,743,000	22,025,000	115,970,000	114,047,000	224,555,000
Segment/Consolidated Margin	2,420,000	6,023,000	36,873,000	28,323,000	74,856,000
Identifiable assets	343,800,000	352,623,000	723,669,000	352,623,000	723,669,000	$ 673,954,000
Depreciation and amortization	5,236,000	13,663,000	22,851,000	35,647,000	45,504,000
Capital Expenditures	712,000	1,063,000	9,241,000	8,924,000	27,616,000
Intercompany receivable (payable)	0					$ 0
Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Identifiable assets	68,966,000	65,057,000	58,149,000	65,057,000	58,149,000
Depreciation and amortization	124,000	146,000	210,000	373,000	490,000
Capital Expenditures	0	20,000	376,000	21,000	497,000
Drilling Services [Member]
Segment Reporting Information [Line Items]
Revenues	6,694,000	18,923,000	65,074,000	69,269,000	124,726,000
Operating costs	4,709,000	10,774,000	43,253,000	46,777,000	82,207,000
Segment/Consolidated Margin	1,985,000	8,149,000	21,821,000	22,492,000	42,519,000
Identifiable assets	198,438,000	207,894,000	412,635,000	207,894,000	412,635,000
Depreciation and amortization	3,088,000	7,996,000	12,261,000	20,202,000	24,149,000
Capital Expenditures	$ 622,000	727,000	3,849,000	5,135,000	13,849,000
Drilling Rigs | drilling_rigs	25
Drilling Services [Member] | Domestic Drilling [Member]
Segment Reporting Information [Line Items]
Revenues	$ 5,866,000	17,450,000	39,652,000	53,341,000	77,661,000
Operating costs	3,646,000	9,236,000	24,698,000	33,101,000	47,167,000
Segment/Consolidated Margin	2,220,000	8,214,000	14,954,000	20,240,000	30,494,000
Identifiable assets	150,897,000	158,283,000	365,477,000	158,283,000	365,477,000
Depreciation and amortization	2,012,000	7,153,000	10,888,000	18,058,000	21,433,000
Capital Expenditures	484,000	621,000	3,325,000	3,862,000	11,567,000
Intercompany receivable (payable)	28,300,000		38,600,000		38,600,000
Drilling Services [Member] | International Drilling [Member]
Segment Reporting Information [Line Items]
Revenues	828,000	1,473,000	25,422,000	15,928,000	47,065,000
Operating costs	1,063,000	1,538,000	18,555,000	13,676,000	35,040,000
Segment/Consolidated Margin	(235,000)	(65,000)	6,867,000	2,252,000	12,025,000
Identifiable assets	47,541,000	49,611,000	47,158,000	49,611,000	47,158,000
Depreciation and amortization	1,076,000	843,000	1,373,000	2,144,000	2,716,000
Capital Expenditures	138,000	106,000	524,000	1,273,000	2,282,000
Intercompany receivable (payable)	$ (28,339,000)		$ (38,608,000)		$ (38,608,000)
Drilling Services [Member] | Drilling Rigs | International Drilling [Member]
Segment Reporting Information [Line Items]
Drilling Rigs | drilling_rigs	5		5		5
Drilling Services [Member] | Assets Leased From Others [Member] | International Drilling [Member]
Segment Reporting Information [Line Items]
Drilling Rigs | drilling_rigs	3		3		3
Production Services [Member]
Segment Reporting Information [Line Items]
Revenues	$ 4,469,000	9,125,000	$ 87,769,000	73,101,000	$ 174,685,000
Operating costs	4,034,000	11,251,000	72,717,000	67,270,000	142,348,000
Segment/Consolidated Margin	435,000	(2,126,000)	15,052,000	5,831,000	32,337,000
Identifiable assets	76,396,000	79,672,000	252,885,000	79,672,000	252,885,000
Depreciation and amortization	2,024,000	5,521,000	10,380,000	15,072,000	20,865,000
Capital Expenditures	90,000	316,000	5,016,000	3,768,000	13,270,000
Production Services [Member] | Well Servicing [Member]
Segment Reporting Information [Line Items]
Revenues	3,756,000	6,331,000	29,506,000	31,947,000	55,760,000
Operating costs	2,810,000	5,926,000	21,038,000	26,877,000	39,934,000
Segment/Consolidated Margin	946,000	405,000	8,468,000	5,070,000	15,826,000
Identifiable assets	47,832,000	49,388,000	121,180,000	49,388,000	121,180,000
Depreciation and amortization	1,261,000	3,039,000	4,942,000	7,820,000	9,824,000
Capital Expenditures	30,000	201,000	2,141,000	1,918,000	6,036,000
Production Services [Member] | Wireline Services [Member]
Segment Reporting Information [Line Items]
Revenues	713,000	2,410,000	47,386,000	35,543,000	93,260,000
Operating costs	1,085,000	3,552,000	41,804,000	31,836,000	81,151,000
Segment/Consolidated Margin	(372,000)	(1,142,000)	5,582,000	3,707,000	12,109,000
Identifiable assets	22,623,000	23,948,000	94,413,000	23,948,000	94,413,000
Depreciation and amortization	763,000	2,011,000	3,907,000	5,088,000	7,982,000
Capital Expenditures	60,000	112,000	1,588,000	1,684,000	4,423,000
Production Services [Member] | Coiled Tubing Services [Member]
Segment Reporting Information [Line Items]
Revenues	0	384,000	10,877,000	5,611,000	25,665,000
Operating costs	139,000	1,773,000	9,875,000	8,557,000	21,263,000
Segment/Consolidated Margin	(139,000)	(1,389,000)	1,002,000	(2,946,000)	4,402,000
Identifiable assets	5,941,000	6,336,000	37,292,000	6,336,000	37,292,000
Depreciation and amortization	0	471,000	1,531,000	2,164,000	3,059,000
Capital Expenditures	$ 0	$ 3,000	$ 1,287,000	$ 166,000	$ 2,811,000