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SEGMENT INFORMATION (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 6 Months Ended
Jun. 30, 2013
segments
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Dec. 31, 2012
Segment Reporting Information [Line Items]          
Number of Reportable Segments 3        
Revenues $ 52,013 $ 48,455 $ 102,448 $ 94,587  
Depreciation 1,709 1,275 3,366 2,526  
Amortization of intangible assets 1,708 1,695 3,409 3,535  
Operating income (loss) 12,701 15,679 24,156 29,574  
Interest expense (344) (1,052) (719) (1,369)  
Interest income 10 44 24 56  
Other income 237 0 232 0  
Income before income taxes 12,604 14,671 23,693 28,261  
Capital expenditures 2,886 1,634 6,041 2,986  
Assets 339,984   339,984   354,230
U.S [Member]
          
Segment Reporting Information [Line Items]          
Revenues 41,855 38,408 82,840 74,805  
Non-U.S [Member]
          
Segment Reporting Information [Line Items]          
Revenues 10,158 10,047 19,608 19,782  
Tech & Clearance [Member]
          
Segment Reporting Information [Line Items]          
Revenues 36,288 32,243 72,091 63,303  
Depreciation 1,488 1,049 2,897 2,064  
Amortization of intangible assets 561 0 1,106 0  
Operating income (loss) 10,359 12,658 20,804 24,368  
Capital expenditures 2,709 1,153 5,457 2,307  
Assets 177,122   177,122   183,896
Finance [Member]
          
Segment Reporting Information [Line Items]          
Revenues 8,727 9,762 17,335 19,762  
Depreciation 129 137 271 286  
Amortization of intangible assets 193 0 387 0  
Operating income (loss) 1,972 3,480 3,625 6,740  
Capital expenditures 47 238 106 333  
Assets 88,250   88,250   92,513
Energy [Member]
          
Segment Reporting Information [Line Items]          
Revenues 5,960 5,282 10,987 9,327  
Depreciation 32 23 58 46  
Amortization of intangible assets 775 1,600 1,550 3,334  
Operating income (loss) 1,646 367 2,635 (94)  
Capital expenditures 44 5 299 10  
Assets 52,105   52,105   53,203
Other [Member]
          
Segment Reporting Information [Line Items]          
Revenues 1,038 1,168 2,035 2,195  
Depreciation 60 66 140 130  
Amortization of intangible assets 179 95 366 201  
Operating income (loss) (1,276) (826) (2,908) (1,440)  
Capital expenditures 86 238 179 336  
Assets $ 22,507   $ 22,507   $ 24,618