Related Party Transactions (Tables)

6 Months Ended

Jul. 31, 2012

Notes To Financial Statements [Abstract]

Revenue Recognized from Related Party

The following table shows revenue recognized from these customers:

	Three months ended July 31,						Six months ended July 31,
	2012			2011			2012			2011
Revenues from customers	$	21,965		$	7,005		$	31,274		$	24,311
Percentage of total revenues	9.1		%	3.3		%	6.4		%	5.5		%