Debt Capital leases (Details) (USD $)	12 Months Ended
Jan. 31, 2015	Jan. 31, 2014
Debt Instrument [Line Items]
Capital Lease Obligations	$ 1,906,000us-gaap_CapitalLeaseObligations	2,067,000us-gaap_CapitalLeaseObligations
Capital Lease Obligations [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	429,000
Debt Instrument, Interest Rate at Period End	1.50%
Debt Instrument, Periodic Payment	15,000
Debt Instrument, Date of First Required Payment	Apr. 01, 2015
Debt Instrument, Maturity Date	Mar. 31, 2020
.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. 01, 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
Indian capital leases [Member]
Debt Instrument [Line Items]
Capital Lease Obligations	24,000
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Minimum	12.80%
Debt Instrument, Interest Rate, Effective Percentage Rate Range, Maximum	18.20%
Face value of debt in local currency	1.5 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

Face value of debt in local currency

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Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal through the balance sheet date.

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Date the debt agreement requires the first payment to be made, in CCYY-MM-DD format.

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Face (par) amount of debt instrument at time of issuance.

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Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

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- Definition

When presenting a range of interest rates, the highest effective rate for funds borrowed under the debt agreement as of the balance sheet date.

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Minimum contractual interest rate for funds borrowed, under the debt agreement.

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Date the debt instrument was issued, in CCYY-MM-DD format.

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- Definition

Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

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Amount of the required periodic payments including both interest and principal payments.

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