Segment Reporting (Details) - USD ($) $ in Thousands	3 Months Ended				12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2014
Operating Segments | Operating expense | Learning A-Z Segment
Segment Reporting Information [Line Items]
Prior period reclassification adjustment	$ 36	$ 37	$ 36	$ 33	$ 142
Operating Segments | Operating expense | Voyager Sopris Learning Segment
Segment Reporting Information [Line Items]
Prior period reclassification adjustment	214	170	170	173	727
Operating Segments | Capital expenditures - general expenditures | Learning A-Z Segment
Segment Reporting Information [Line Items]
Prior period reclassification adjustment	274	304	406	221	1,205
Operating Segments | Capital expenditures - general expenditures | Voyager Sopris Learning Segment
Segment Reporting Information [Line Items]
Prior period reclassification adjustment	42	55	89	119	305
Operating Segments | Capital expenditures - general expenditures | ExploreLearning Segment
Segment Reporting Information [Line Items]
Prior period reclassification adjustment	44	13	66	192	315
Other | Operating expense
Segment Reporting Information [Line Items]
Prior period reclassification adjustment	(250)	(207)	(206)	(206)	(869)
Other | Capital expenditures - general expenditures
Segment Reporting Information [Line Items]
Prior period reclassification adjustment	$ (360)	$ (372)	$ (561)	$ (532)	$ (1,825)