Business Segments (Details 1) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Identifiable assets:
Total assets	$ 365,007	$ 315,601
Learning Solutions [Member]
Identifiable assets:
Total assets	170,093	147,595
Professional and Technical Services [Member]
Identifiable assets:
Total assets	87,014	80,033
Sandy Training and Marketing [Member]
Identifiable assets:
Total assets	29,957	25,804
Performance Readiness Solutions [Member]
Identifiable assets:
Total assets	$ 77,943	$ 62,169