Debt Term Loans (Details) (USD $)	12 Months Ended
	Jan. 31, 2014	Jan. 31, 2013
Loans Payable	$ 6,494,000	$ 10,608,000
Debt Instrument, Issuance Date	Jan. 18, 2008
Debt Instrument, Periodic Payment	23,000
Mortgage Loans on Real Estate, Final Maturity Date	Jan. 31, 2018
Debt Instrument, Interest Rate at Period End	6.30%
Capital Lease Obligations [Member]
Debt Instrument, Maturity Date Range, End	May 31, 2015
Debt Instrument, Periodic Payment	0
Debt Instrument, Maturity Date Range, Start	Jun. 30, 2014
Debt Instrument, Name [Domain]
Debt Instrument, Increase, Additional Borrowings	2,500,000
Short-term Debt	600,000
Debt Instrument, Issuance Date	Aug. 28, 2007
Line of Credit Facility, Interest Rate at Period End	3.25%
Debt, Weighted Average Interest Rate	4.20917%	4.24%
Debt Instrument, Basis Spread on Variable Rate	0.50%
Debt Instrument, Periodic Payment	107,000
Debt Instrument, Interest Rate at Period End	0.25%
Debt Instrument, Face Amount	3,000,000
1.360 Euro loan [Member]
Debt Instrument, Issuance Date	Dec. 10, 2012
Face value of debt in local currency	1.4 million Euros
Debt Instrument, Periodic Payment	108,000
Debt Instrument, Maturity Date	Dec. 31, 2017
Debt Instrument, Interest Rate at Period End	3.70%
Debt Instrument, Face Amount	1,800,000
423K Dirhams loan [Member]
Debt Instrument, Issuance Date	Nov. 25, 2012
Face value of debt in local currency	0.4 million Dirhams
Debt Instrument, Periodic Payment	5,000
Debt Instrument, Interest Rate at Period End	3.40%
Debt Instrument, Face Amount	115,000
Saudi term loan [Member]
Debt Instrument, Issuance Date	Apr. 10, 2012
Face value of debt in local currency	22.2 million Dirhams
Debt Instrument, Periodic Payment	408,000
Debt Instrument, Maturity Date	Apr. 30, 2017
Debt Instrument, Interest Rate at Period End	5.50%
Debt Instrument, Face Amount	5,900,000
700K Euro loan [Member]
Debt Instrument, Issuance Date	Apr. 08, 2003
Face value of debt in local currency	0.7 million Euros
Debt Instrument, Periodic Payment	9,000
Debt Instrument, Maturity Date	Apr. 30, 2014
Debt Instrument, Interest Rate at Period End	6.10%
Debt Instrument, Face Amount	800,000
Perma Pipe US [Member]
Debt Instrument, Issuance Date	May 14, 2010
Debt Instrument, Periodic Payment	24,000
Debt Instrument, Maturity Date	May 31, 2014
Debt Instrument, Interest Rate at Period End	5.80%
Debt Instrument, Face Amount	$ 1,000,000