Restructuring, Acquisition and Other Charges (Details 1) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jan. 31, 2013	Jan. 31, 2012
Summary of nature of restructuring charges and amounts
Beginning balance	$ 61	$ 1,810
Accrued		163
Paid		(1,912)
Accrued or Adjusted	(61)
Ending balance		61
Severance, payroll taxes and other employee benefits [Member]
Summary of nature of restructuring charges and amounts
Beginning balance		1,347
Accrued
Paid		(1,347)
Accrued or Adjusted
Ending balance
Facilities closures, legal and other miscellaneous [Member]
Summary of nature of restructuring charges and amounts
Beginning balance	61	463
Accrued		163
Paid		(565)
Accrued or Adjusted	(61)
Ending balance		$ 61