Business [Abstract] for Organization and Summary of Significant Accounting Policies

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Amount of short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

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Amount of cash and cash equivalents restricted as to withdrawal or usage, classified as current. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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Organization and Summary of Significant Accounting Policies (Narrative) (Details)	Sep. 30, 2020 USD ($) wireline_tubing_units drilling_rigs well_service_rigs	Dec. 31, 2019 USD ($)
Cash and Cash Equivalents
Cash Equivalents, at Carrying Value \| $	$ 0	$ 8,900,000
Restricted Cash from Proceeds of Qualifying Sales of Property & Equipment \| $	2,200,000
Restricted cash \| $	$ 4,021,000	$ 998,000
Drilling Services [Member]
Business - Drilling
Drilling Rigs	25
Drilling Services [Member] \| Pad-Capable [Member]
Business - Drilling
Percentage of Drilling Fleet	100.00%
Well Servicing [Member] \| 550 Horsepower [Member]
Business - Production Services
Well Servicing Rigs \| well_service_rigs	111
Well Servicing [Member] \| 600 Horsepower [Member]
Business - Production Services
Well Servicing Rigs \| well_service_rigs	12
Well Servicing [Member] \| Production Services [Member]
Business - Production Services
Well Servicing Rigs \| well_service_rigs	123
Wireline Services [Member] \| Production Services [Member]
Business - Production Services
Wireline Units \| wireline_tubing_units	78
Domestic Drilling [Member] \| Drilling Services [Member] \| United States [Member]
Business - Drilling
Drilling Divisions	3
Drilling Rigs	17
Domestic Drilling [Member] \| Drilling Services [Member] \| United States [Member] \| AC [Member]
Business - Drilling
Drilling Rigs	17
Domestic Drilling [Member] \| Drilling Services [Member] \| United States [Member] \| SCR Drilling Rigs [Member]
Business - Drilling
Drilling Rigs	0
International Drilling [Member] \| Drilling Services [Member] \| Colombia [Member]
Business - Drilling
Drilling Rigs	8
International Drilling [Member] \| Drilling Services [Member] \| Colombia [Member] \| AC [Member]
Business - Drilling
Drilling Rigs	0
International Drilling [Member] \| Drilling Services [Member] \| Colombia [Member] \| SCR Drilling Rigs [Member]
Business - Drilling
Drilling Rigs	8