Business Combinations And Goodwill (Tables)

12 Months Ended

Dec. 31, 2020

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of changes in carrying amount of goodwill

The changes in the carrying amount of goodwill are as follows (in thousands): 

	Well Intervention
Balance at December 31, 2018	$	—
Additions (1)	6,855
Other adjustments (2)	302
Balance at December 31, 2019	7,157
Other adjustments (2)	(468)
Impairment loss (3)	(6,689)
Balance at December 31, 2020	$	—

(1)Relates to goodwill arising from the acquisition of a controlling interest in STL in May 2019.

(2)Relates to foreign currency adjustments.

(3)Relates to the impairment of the entire STL goodwill balance in March 2020.