Quarterly report pursuant to Section 13 or 15(d)

Segment Information - Financial Information Related to Assets Position (Details)

v3.19.1
Segment Information - Financial Information Related to Assets Position (Details) - USD ($)
$ in Thousands
Mar. 31, 2019
Dec. 31, 2018
Segment Reporting, Revenue Reconciling Item [Line Items]    
Total assets $ 345,699 $ 324,549
Operating Segments    
Segment Reporting, Revenue Reconciling Item [Line Items]    
Total assets 348,209 326,206
Operating Segments | Directional Drilling    
Segment Reporting, Revenue Reconciling Item [Line Items]    
Total assets 119,886 105,942
Operating Segments | Pressure Pumping    
Segment Reporting, Revenue Reconciling Item [Line Items]    
Total assets 113,202 121,824
Operating Segments | Pressure Control    
Segment Reporting, Revenue Reconciling Item [Line Items]    
Total assets 75,424 70,401
Operating Segments | Wireline    
Segment Reporting, Revenue Reconciling Item [Line Items]    
Total assets 39,697 28,039
Corporate and Other    
Segment Reporting, Revenue Reconciling Item [Line Items]    
Total assets 9,493 7,344
Eliminations    
Segment Reporting, Revenue Reconciling Item [Line Items]    
Total assets $ (12,003) $ (9,001)