Intangible Assets (Details) (USD $) In Thousands, unless otherwise specified				12 Months Ended			12 Months Ended
Feb. 28, 2013	Feb. 29, 2012	Feb. 28, 2011	Feb. 28, 2013 Maximum [Member]	Feb. 28, 2013 Minimum [Member]	Feb. 28, 2013 Trademarks [Member]	Feb. 29, 2012 Trademarks [Member]	Feb. 28, 2013 Trademarks [Member] Maximum [Member]	Feb. 28, 2013 Trademarks [Member] Minimum [Member]	Feb. 28, 2013 Completed technologies [Member]	Feb. 29, 2012 Completed technologies [Member]
Summary of intangible assets
Amortization Periods (In Years)				15 years	7 years			15 years	7 years	12 years
Gross Carrying Amount	$ 2,044	$ 2,044				$ 424	$ 424			$ 1,620	$ 1,620
Accumulated Amortization	(1,510)	(1,339)				(397)	(361)			(1,113)	(978)
Total	$ 534	$ 705	$ 875			$ 27	$ 63			$ 507	$ 642

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 2

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=7658586&loc=d3e16323-109275

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 142

-Paragraph 45

-Subparagraph a(1)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Name:	us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant