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Significant Accounting Policies - Goodwill (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Segment information:
Goodwill	$ 32,150	$ 32,150
Goodwill impairment	0	0
Technical Services
Segment information:
Goodwill	30,992	30,992
Support Services
Segment information:
Goodwill	$ 1,158	$ 1,158

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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