Organization and Summary of Significant Accounting Policies (Narrative) (Details) $ in Thousands	Dec. 31, 2019 USD ($) coiled_tubing_units well_service_rigs drilling_rigs wireline_tubing_units	Jan. 01, 2019 USD ($)	Dec. 31, 2018 USD ($)
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Operating lease assets | $	$ 7,264		$ 0
Operating lease liability | $	7,898
Cash and Cash Equivalents
Cash Equivalents, at Carrying Value | $	$ 8,900		$ 40,600
Accounting Standards Update 2016-02
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Operating lease assets | $		$ 9,800
Operating lease liability | $		9,800
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets | $		$ 300
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	112
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	124
Wireline Services [Member] | Production Services [Member]
Business - Production Services
Wireline Units | wireline_tubing_units	93
Coiled Tubing Services [Member] | Production Services [Member]
Business - Production Services
Coiled Tubing Units | coiled_tubing_units	9
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