Operating Segments and Related Information (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2020	Mar. 31, 2019
Segment information
Revenue, net	$ 36,839	$ 38,804
Net loss from continuing operations	(3,883)	(4,241)
Income tax expense	(44)	168
Interest expense, net	342	473
EBIT	(3,585)	(3,600)
Depreciation of property, equipment and software	2,141	2,203
Amortization of intangible assets	829	862
EBITDA	(615)	(535)
Other loss (income)	0	(19)
Foreign currency transaction losses (gains) on short-term intercompany balances	1,456	206
Transformation, severance, and other expenses	1,307	697
Stock-based compensation	1,320	1,384
Adjusted EBITDA from continuing operations	3,468	1,733
Recovery Audit Services - Americas [Member]
Segment information
Revenue, net	26,223	27,373
EBIT	4,478	6,004
Depreciation of property, equipment and software	1,938	1,762
Amortization of intangible assets	408	438
EBITDA	6,824	8,204
Other loss (income)		0
Foreign currency transaction losses (gains) on short-term intercompany balances	896	(73)
Transformation, severance, and other expenses	688	128
Stock-based compensation	0	0
Adjusted EBITDA from continuing operations	8,408	8,259
Recovery Audit Services - Europe/Asia-Pacific [Member]
Segment information
Revenue, net	9,785	9,759
EBIT	1,439	313
Depreciation of property, equipment and software	169	162
Amortization of intangible assets	42	37
EBITDA	1,650	512
Other loss (income)		9
Foreign currency transaction losses (gains) on short-term intercompany balances	874	399
Transformation, severance, and other expenses	208	123
Stock-based compensation	0	0
Adjusted EBITDA from continuing operations	2,732	1,043
Adjacent Services [Member]
Segment information
Revenue, net	831	1,672
EBIT	138	(2,145)
Depreciation of property, equipment and software	34	279
Amortization of intangible assets	379	387
EBITDA	551	(1,479)
Other loss (income)		0
Foreign currency transaction losses (gains) on short-term intercompany balances	4	(6)
Transformation, severance, and other expenses	80	18
Stock-based compensation	0	0
Adjusted EBITDA from continuing operations	635	(1,467)
Corporate Support [Member]
Segment information
Revenue, net	0	0
EBIT	(9,640)	(7,772)
Depreciation of property, equipment and software	0	0
Amortization of intangible assets	0	0
EBITDA	(9,640)	(7,772)
Other loss (income)		(28)
Foreign currency transaction losses (gains) on short-term intercompany balances	(318)	(114)
Transformation, severance, and other expenses	331	428
Stock-based compensation	1,320	1,384
Adjusted EBITDA from continuing operations	$ (8,307)	$ (6,102)

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