Operating Segments and Related Information (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Segment information
Revenue, net	$ 39,183	$ 35,137	$ 35,291	$ 31,233	$ 34,957	$ 33,365	$ 36,995	$ 32,985	$ 140,844	$ 138,302	$ 161,552
Net income (loss) from continuing operations									2,229	1,539	(2,699)
Income tax expense	1,263	(685)	460	204	(803)	421	296	455	1,242	369	3,241
Interest income, net	(98)	(14)	(12)	(29)	(87)	(8)	(53)	(42)	(153)	(190)	(77)
EBIT									3,318	1,718	465
Depreciation of property and equipment	1,209	1,376	1,216	1,232	1,489	1,255	1,294	1,279	5,033	5,317	6,025
Amortization of intangible assets	650	393	395	394	441	517	754	746	1,832	2,458	3,531
EBITDA									10,183	9,493	10,021
Foreign currency transaction (gains) losses on short-term intercompany balances	1,060	(165)	196	(1,007)	235	654	(416)	1,692	84	2,165	2,003
Acquisition-related charges											249
Transformation severance and related expenses									1,329	1,249	3,640
Other (income) loss	19	$ (168)	$ 18	$ 10	(421)	$ 1,612	$ 0	$ 0	(121)	1,191	57
Stock-based compensation									5,123	3,926	4,532
Adjusted EBITDA									16,598	18,024	20,502
Capital expenditures									5,887	4,482	4,704
Allocated assets	73,035				59,540				73,035	59,540	73,404
Cash and cash equivalents	15,723				15,122				15,723	15,122	25,735	$ 43,700
Restricted cash	47				48				47	48
Deferred income taxes	2,269				1,361				2,269	1,361
Total assets	93,474				80,391				93,474	80,391	102,782
Continuing Operations [Member]
Segment information
Cash and cash equivalents	15,723				15,122				15,723	15,122	25,735
Restricted cash	47				48				47	48	53
Deferred loan cost					80					80
Deferred income taxes	2,269				1,361				2,269	1,361	41
Prepaid expenses and other assets	800				2,465				800	2,465	2,729
Discontinued Operations [Member]
Segment information
Discontinued operations	1,600				1,775				1,600	1,775	820
Recovery Audit Services - Americas [Member]
Segment information
Revenue, net									99,861	97,009	106,533
EBIT									25,476	22,539	21,066
Depreciation of property and equipment									3,750	4,036	4,711
Amortization of intangible assets									1,477	1,728	2,002
EBITDA									30,703	28,303	27,779
Foreign currency transaction (gains) losses on short-term intercompany balances									31	807	380
Acquisition-related charges											0
Transformation severance and related expenses									517	322	1,348
Other (income) loss									0	0	0
Stock-based compensation									0	0
Adjusted EBITDA									31,251	29,432	29,507
Capital expenditures									4,393	3,669	3,930
Allocated assets	47,690				44,588				47,690	44,588	50,252
Total assets	47,690				44,588				47,690	44,588	50,252
Recovery Audit Services - Europe/Asia-Pacific [Member]
Segment information
Revenue, net									37,335	36,264	44,319
EBIT									6,455	2,573	2,772
Depreciation of property and equipment									529	647	592
Amortization of intangible assets									0	600	1,195
EBITDA									6,984	3,820	4,559
Foreign currency transaction (gains) losses on short-term intercompany balances									107	1,533	1,828
Acquisition-related charges											0
Transformation severance and related expenses									312	589	1,285
Other (income) loss									0	0	0
Stock-based compensation									0	0
Adjusted EBITDA									7,403	5,942	7,672
Capital expenditures									600	543	651
Allocated assets	14,813				13,922				14,813	13,922	18,556
Total assets	14,813				13,922				14,813	13,922	18,556
Adjacent Services [Member]
Segment information
Revenue, net									3,648	5,029	10,700
EBIT									(4,617)	(5,131)	(4,161)
Depreciation of property and equipment									754	634	722
Amortization of intangible assets									355	130	334
EBITDA									(3,508)	(4,367)	(3,105)
Foreign currency transaction (gains) losses on short-term intercompany balances									17	12	0
Acquisition-related charges											249
Transformation severance and related expenses									258	30	418
Other (income) loss									(121)	1,191	57
Stock-based compensation									0	0
Adjusted EBITDA									(3,354)	(3,134)	(2,381)
Capital expenditures									894	270	123
Allocated assets	10,532				1,030				10,532	1,030	4,596
Total assets	10,532				1,030				10,532	1,030	4,596
Corporate Support [Member]
Segment information
Revenue, net									0	0	0
EBIT									(23,996)	(18,263)	(19,212)
Depreciation of property and equipment									0	0	0
Amortization of intangible assets									0	0	0
EBITDA									(23,996)	(18,263)	(19,212)
Foreign currency transaction (gains) losses on short-term intercompany balances									(71)	(187)	(205)
Acquisition-related charges											0
Transformation severance and related expenses									242	308	589
Other (income) loss									0	0
Stock-based compensation									5,123	3,926	4,532
Adjusted EBITDA									(18,702)	(14,216)	(14,296)
Capital expenditures									0	0	0
Allocated assets	0				0				0	0	0
Total assets	20,439				20,851				20,439	20,851	29,378
Corporate Support [Member] | Continuing Operations [Member]
Segment information
Cash and cash equivalents	15,723				15,122				15,723	15,122	25,735
Restricted cash	47				48				47	48	53
Deferred loan cost					80					80
Deferred income taxes	2,269				1,361				2,269	1,361	41
Prepaid expenses and other assets	800				2,465				800	2,465	2,729
Corporate Support [Member] | Discontinued Operations [Member]
Segment information
Discontinued operations	$ 1,600				$ 1,775				$ 1,600	$ 1,775	$ 820