Business Segments (Detail Textuals) (USD $) In Thousands, unless otherwise specified	1 Months Ended	12 Months Ended
	Dec. 23, 2010 Segment	Apr. 30, 2011
Segment Reporting [Abstract]
Number of reportable segment	2
Gain on deconsolidation of subsidiaries		$ 50,510	[1]
Restructuring expenses		3,764
Exit lease obligation		914
Share-based compensation		1,770
Provision for settlement		$ (1,767)

[1] Represents the gain of $50,510,000 from deconsolidation of the asset management and Value Line Mutual Fund Distribution subsidiaries.