Debt Capital leases (Details) (USD $)	12 Months Ended
	Jan. 31, 2014	Jan. 31, 2013
Debt Instrument [Line Items]
Capital Lease Obligations	$ 2,067,000	$ 2,584,000
Debt Instrument, Issuance Date	Jan. 18, 2008
Debt Instrument, Interest Rate at Period End	6.30%
Debt Instrument, Periodic Payment	23,000
.05 million Filtration loan [Member]
Debt Instrument [Line Items]
Debt Instrument, Issuance Date	Nov. 28, 2013
Face value of debt in local currency	0.5 million DKK
Debt Instrument, Face Amount	79,000
Debt Instrument, Interest Rate at Period End	3.70%
Debt Instrument, Periodic Payment	2,000
Debt Instrument, Maturity Date	Dec. 31, 2018
1.5 million DKK Filtration loan [Member]
Debt Instrument [Line Items]
Debt Instrument, Issuance Date	Jul. 13, 2012
Face value of debt in local currency	1.5 million DKK
Debt Instrument, Face Amount	300,000
Debt Instrument, Interest Rate at Period End	5.20%
Debt Instrument, Periodic Payment	4,000
Debt Instrument, Maturity Date	Aug. 31, 2017
Piping and Filtration [Member]
Debt Instrument [Line Items]
Debt Instrument, Issuance Date	May 01, 2012
Debt Instrument, Face Amount	1,100,000
Debt Instrument, Interest Rate at Period End	6.50%
Debt Instrument, Periodic Payment	21,000
Debt Instrument, Maturity Date	Jun. 30, 2017
Equipment loan [Member]
Debt Instrument [Line Items]
Capital Lease Obligations	1,200,000
Debt Instrument, Issuance Date	Jan. 31, 2012
Debt Instrument, Interest Rate at Period End	6.70%
Debt Instrument, Periodic Payment	24,000
Debt Instrument, Maturity Date	Jan. 31, 2017
2.180 DKK loan [Member]
Debt Instrument [Line Items]
Capital Lease Obligations	400,000
Debt Instrument, Issuance Date	Jul. 01, 2011
Face value of debt in local currency	2.2 million DKK
Debt Instrument, Interest Rate at Period End	6.40%
Debt Instrument, Periodic Payment	6,000
Debt Instrument, Maturity Date	Jun. 30, 2016
Capital Lease Obligations [Member]
Debt Instrument [Line Items]
Capital Lease Obligations	81,000
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Minimum	3.80%
Debt Instrument, Interest Rate, Effective Percentage Rate Range, Maximum	4.60%
Debt Instrument, Periodic Payment	0
Debt Instrument, Maturity Date Range, Start	Jun. 30, 2014
Debt Instrument, Maturity Date Range, End	May 31, 2015
423K Dirhams loan [Member]
Debt Instrument [Line Items]
Debt Instrument, Issuance Date	Nov. 25, 2012
Face value of debt in local currency	0.4 million Dirhams
Debt Instrument, Face Amount	115,000
Debt Instrument, Interest Rate at Period End	3.40%
Debt Instrument, Periodic Payment	5,000
Indian capital leases [Member]
Debt Instrument [Line Items]
Capital Lease Obligations	57,000
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Minimum	12.80%
Debt Instrument, Interest Rate, Effective Percentage Rate Range, Maximum	17.80%
Face value of debt in local currency	3.1 million Indian Rupees
Debt Instrument, Periodic Payment	1,000
952 DDK Loan [Member]
Debt Instrument [Line Items]
Capital Lease Obligations	200,000
Debt Instrument, Issuance Date	Apr. 23, 2010
Face value of debt in local currency	1.0 million DKK
Debt Instrument, Interest Rate at Period End	9.70%
Debt Instrument, Periodic Payment	$ 2,500
Debt Instrument, Maturity Date	Jun. 30, 2015