Operating Segments and Related Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Segment information
Revenue	$ 38,510	$ 35,291	$ 72,079	$ 66,524
Net loss from continuing operations	(325)	(33)	(2,173)	(98)
Income tax expense	879	460	1,506	664
Interest expense (income), net	48	(12)	85	(41)
EBIT	602	415	(582)	525
Depreciation of property and equipment	1,109	1,216	2,329	2,448
Amortization of intangible assets	722	395	1,444	789
EBITDA	2,433	2,026	3,191	3,762
Other expense (income)	5	18	(194)	28
Foreign currency transaction (gains) losses on short-term intercompany balances	(957)	196	(1,509)	(811)
Transformation severance and related expenses	315	225	899	759
Stock-based compensation	1,688	1,035	3,254	1,799
Adjusted EBITDA	3,484	3,500	5,641	5,537
Recovery Audit Services - Americas [Member]
Segment information
Revenue	26,553	25,122	50,936	46,689
EBIT	5,586	5,998	11,571	9,996
Depreciation of property and equipment	779	936	1,689	1,928
Amortization of intangible assets	328	373	657	745
EBITDA	6,693	7,307	13,917	12,669
Other expense (income)		0		0
Foreign currency transaction (gains) losses on short-term intercompany balances	(78)	30	(241)	(228)
Transformation severance and related expenses	187	276	264	420
Stock-based compensation		0	0	0
Adjusted EBITDA	6,802	7,613	13,940	12,861
Recovery Audit Services - Europe/Asia-Pacific [Member]
Segment information
Revenue	10,773	8,698	18,604	17,947
EBIT	3,057	505	3,466	2,759
Depreciation of property and equipment	152	140	292	238
Amortization of intangible assets		0	0	0
EBITDA	3,209	645	3,758	2,997
Other expense (income)		0		0
Foreign currency transaction (gains) losses on short-term intercompany balances	(937)	185	(1,189)	(561)
Transformation severance and related expenses	82	25	221	96
Stock-based compensation		0	0	0
Adjusted EBITDA	2,354	855	2,790	2,532
Adjacent Services [Member]
Segment information
Revenue	1,184	1,471	2,539	1,888
EBIT	(1,913)	(488)	(3,655)	(1,574)
Depreciation of property and equipment	178	140	348	282
Amortization of intangible assets	394	22	787	44
EBITDA	(1,341)	(326)	(2,520)	(1,248)
Other expense (income)	5	18	(193)	28
Foreign currency transaction (gains) losses on short-term intercompany balances	(2)	7	(4)	6
Transformation severance and related expenses	45	0	45	0
Stock-based compensation		0	0	0
Adjusted EBITDA	(1,293)	(301)	(2,672)	(1,214)
Corporate Support [Member]
Segment information
EBIT	(6,128)	(5,600)	(11,964)	(10,656)
Depreciation of property and equipment			0	0
Amortization of intangible assets			0	0
EBITDA	(6,128)	(5,600)	(11,964)	(10,656)
Other expense (income)		0	(1)	0
Foreign currency transaction (gains) losses on short-term intercompany balances	60	(26)	(75)	(28)
Transformation severance and related expenses	1	(76)	369	243
Stock-based compensation	1,688	1,035	3,254	1,799
Adjusted EBITDA	$ (4,379)	$ (4,667)	$ (8,417)	$ (8,642)