SEGMENT INFORMATION (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017 USD ($)	Jun. 30, 2016 USD ($)	Jun. 30, 2017 USD ($) segments	Jun. 30, 2016 USD ($)	Dec. 31, 2016 USD ($)
Segment Reporting Information [Line Items]
Number of Reportable Segments | segments			3
Revenues	$ 52,400	$ 57,673	$ 104,590	$ 115,959
Depreciation	2,819	2,563	5,127	5,161
Amortization of intangible assets	571	2,070	1,132	4,536
Operating income (loss)	4,002	8,485	8,297	11,127
Interest expense	(814)	(820)	(1,604)	(1,692)
Other expense	9	(17)	(7)	(32)
Income before income taxes	3,197	7,648	6,686	9,403
Capital expenditures	3,666	2,808	7,808	5,317
Assets	305,608		305,608		$ 310,095
United States [Member]
Segment Reporting Information [Line Items]
Revenues	39,106	42,323	78,157	85,000
UNITED KINGDOM
Segment Reporting Information [Line Items]
Revenues	4,610	5,611	9,345	13,584
EMEA, APAC and Canada [Domain]
Segment Reporting Information [Line Items]
Revenues	8,684	9,739	17,088	17,375
Non-US [Member]
Segment Reporting Information [Line Items]
Revenues	13,294	15,350	26,433	30,959
Tech & Clearance [Member]
Segment Reporting Information [Line Items]
Revenues	31,303	34,153	62,993	68,159
Depreciation	1,695	1,770	3,151	3,508
Amortization of intangible assets	0	729	0	1,457
Operating income (loss)	10,712	13,291	22,156	25,124
Capital expenditures	2,510	1,837	5,212	3,413
Assets	173,971		173,971		179,985
Global Industry Group Segment [Member]
Segment Reporting Information [Line Items]
Revenues	14,504	16,546	28,262	33,100
Depreciation	247	230	472	452
Amortization of intangible assets	363	1,074	727	2,545
Operating income (loss)	510	2,477	628	3,123
Capital expenditures	296	186	790	541
Assets	100,177		100,177		98,821
Healthcare Segment [Member]
Segment Reporting Information [Line Items]
Revenues	6,565	6,955	13,279	13,913
Depreciation	537	495	1,045	1,091
Amortization of intangible assets	163	218	325	436
Operating income (loss)	(642)	107	(1,092)	(171)
Capital expenditures	288	221	630	397
Assets	13,417		13,417		14,375
Corporate & Other Segment [Member]
Segment Reporting Information [Line Items]
Revenues	28	19	56	787
Depreciation	340	68	459	110
Amortization of intangible assets	45	49	80	98
Operating income (loss)	(6,578)	(7,390)	(13,395)	(16,949)
Capital expenditures	572	$ 564	1,176	$ 966
Assets	$ 18,043		$ 18,043		$ 16,914