Business Segments (Details 2) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Additions to property, plant and equipment:
Property, Plant and Equipment, Additions	$ 6,714	$ 2,536	$ 3,975
Depreciation and amortization:
Depreciation and amortization	8,617	7,971	6,187
Learning Solutions [Member]
Additions to property, plant and equipment:
Property, Plant and Equipment, Additions	2,788	1,149	1,293
Depreciation and amortization:
Depreciation and amortization	4,990	3,411	2,173
Professional and Technical Services [Member]
Additions to property, plant and equipment:
Property, Plant and Equipment, Additions	233	84	296
Depreciation and amortization:
Depreciation and amortization	715	668	734
Sandy Training and Marketing [Member]
Additions to property, plant and equipment:
Property, Plant and Equipment, Additions	11	38	6
Depreciation and amortization:
Depreciation and amortization	427	428	424
Performance Readiness Solutions [Member]
Additions to property, plant and equipment:
Property, Plant and Equipment, Additions	553	61	161
Depreciation and amortization:
Depreciation and amortization	778	1,102	871
Energy Services [Member]
Additions to property, plant and equipment:
Property, Plant and Equipment, Additions	352	273	643
Depreciation and amortization:
Depreciation and amortization	393	511	435
Corporate and Other [Member]
Additions to property, plant and equipment:
Property, Plant and Equipment, Additions	2,777	931	1,576
Depreciation and amortization:
Depreciation and amortization	$ 1,314	$ 1,851	$ 1,550