Organization and Summary of Significant Accounting Policies (Narrative) (Details) $ in Millions	Mar. 31, 2020 USD ($) well_service_rigs drilling_rigs coiled_tubing_units wireline_tubing_units	Dec. 31, 2019 USD ($)
Cash and Cash Equivalents
Cash Equivalents, at Carrying Value | $	$ 0.0	$ 8.9
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	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