Operating Segments and Related Information (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2017	Jun. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Segment information
Revenue	$ 42,467	$ 35,137	$ 35,137	$ 114,546	$ 101,661
Net income from continuing operations	1,077	2,150	2,150	(1,096)	2,052
Income tax expense (benefit)	930	(685)	(685)	2,436	(21)
Interest expense (income), net	142	(14)	(14)	227	(55)
EBIT	2,149		1,451	1,567	1,976
Depreciation of property and equipment	1,133	1,376	1,376	3,462	3,824
Amortization of intangible assets	722	393	393	2,166	1,182
EBITDA	4,004		3,220	7,195	6,982
Other (income) loss	17	(168)	(168)	(177)	(140)
Foreign currency transaction (gains) losses on short-term intercompany balances	(418)	$ (165)	(165)	(1,927)	(976)
Transformation severance and related expenses	692		420	1,592	1,179
Stock-based compensation	2,107		1,424	5,362	3,224
Adjusted EBITDA	6,402		4,731	12,045	10,269
Recovery Audit Services - Americas [Member]
Segment information
Revenue	30,705		25,719	81,641	72,408
EBIT	8,539		7,371	20,110	17,364
Depreciation of property and equipment	789		935	2,478	2,863
Amortization of intangible assets	329		373	986	1,118
EBITDA	9,657		8,679	23,574	21,345
Other (income) loss	(11)		0	(11)	0
Foreign currency transaction (gains) losses on short-term intercompany balances	(155)		120	(396)	(108)
Transformation severance and related expenses	49		95	313	516
Stock-based compensation	0			0	0
Adjusted EBITDA	9,540		8,894	23,480	21,753
Recovery Audit Services - Europe/Asia-Pacific [Member]
Segment information
Revenue	10,837		8,736	29,441	26,683
EBIT	2,289		1,274	5,754	4,032
Depreciation of property and equipment	161		141	453	379
Amortization of intangible assets			0	0	0
EBITDA	2,450		1,415	6,207	4,411
Other (income) loss	0		0		0
Foreign currency transaction (gains) losses on short-term intercompany balances	(377)		(227)	(1,566)	(787)
Transformation severance and related expenses	360		188	582	284
Stock-based compensation	0			0	0
Adjusted EBITDA	2,433		1,376	5,223	3,908
Adjacent Services [Member]
Segment information
Revenue	925		682	3,464	2,570
EBIT	(2,026)		(1,089)	(5,681)	(2,645)
Depreciation of property and equipment	183		300	531	582
Amortization of intangible assets	393		20	1,180	64
EBITDA	(1,450)		(769)	(3,970)	(1,999)
Other (income) loss	(2)		(168)	(195)	(140)
Foreign currency transaction (gains) losses on short-term intercompany balances	(6)		1	(10)	(7)
Transformation severance and related expenses	260		139	305	138
Stock-based compensation	0			0	0
Adjusted EBITDA	(1,198)		(797)	(3,870)	(2,008)
Corporate Support [Member]
Segment information
EBIT	(6,653)		(6,105)	(18,616)	(16,775)
Depreciation of property and equipment				0	0
Amortization of intangible assets				0	0
EBITDA	(6,653)		(6,105)	(18,616)	(16,775)
Other (income) loss	30		0	29	0
Foreign currency transaction (gains) losses on short-term intercompany balances	120		(59)	45	(74)
Transformation severance and related expenses	23		(2)	392	241
Stock-based compensation	2,107		1,424	5,362	3,224
Adjusted EBITDA	$ (4,373)		$ (4,742)	$ (12,788)	$ (13,384)