XML 43 R20.htm IDEA: XBRL DOCUMENT
v2.4.0.6

Interest expense, net | 12 Months Ended
--- | ---
Jan. 31, 2012
Interest Expense, Net [Abstract] |
Interest Income and Interest Expense Disclosure [Text Block] | Note 12 - Interest expense, net
| 2011 |  | 2010 |  |
Interest expense | $2,165 | $1,937 |
Interest income | (728 | ) | (676 | ) |
Interest expense, net | $1,437 | $1,261 |

X
- Details
Name: | mfri_InterestExpenseNetAbstract
Namespace Prefix: | mfri_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The entire disclosure for interest income and interest expense for enterprises that derive a significant portion of their revenue from interest collected on investments, loans, and securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 1 - 9 -Article 9 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.1-12) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 + Details
Name: | us-gaap_InterestIncomeAndInterestExpenseDisclosureTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration