Summary of Significant Accounting Policies (Details) (USD $)	12 Months Ended
	Jan. 31, 2013	Jan. 31, 2012		Nov. 08, 2012
Schedule of Equity Method Investments [Line Items]
Equity method investment recorded in the income statement	$ (235,000)	$ (29,000)
Net income attributable to noncontrolling interest	976,000	866,000
Stockholders' equity attributable to Non-controlling interest	245,000	1,381,000
Cash and Cash Equivalents [Abstract]
Highly liquid investments, Maturities, Maximum	3 months
Property, Plant and Equipment [Line Items]
Depreciation expense	7,908,000	7,108,000
Goodwill and Intangible Assets [Abstract]
Numbers of reporting units	3
Goodwill impairment loss	0	1,791,000	[1]
Write-down of other intangible assets		400,000
Share-based Compensation [Abstract]
Vesting period - stock options and restricted shares	4 years
Foreign Currency [Abstract]
Foreign currency translation unrealized loss	46,000	41,000
Related Party Transaction [Line Items]
Minority interest (in hundredths)	49.90%
NQA, Inc [Member]
Related Party Transaction [Line Items]
Management fees earned	600,000	600,000
Rent and utilities assessed	83,000	83,000
Minority interest (in hundredths)				49.90%
Ascertiva Group Limited [Member]
Related Party Transaction [Line Items]
Certification fees	600,000	600,000
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	Terms of lease, or estimated useful life (whichever is less)
Minimum [Member] | Buildings [Member]
Property, Plant and Equipment [Line Items]
Useful life	30 years
Minimum [Member] | Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Useful life	3 years
Maximum [Member] | Buildings [Member]
Property, Plant and Equipment [Line Items]
Useful life	35 years
Maximum [Member] | Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Useful life	20 years
Revenue [Member] | Minimum [Member]
Concentration Risk [Line Items]
Single customer concentration threshold percentage (in hundredths)	10.00%
Revenue [Member] | Geographic Concentration Risk [Member]
Concentration Risk [Line Items]
Total revenues from customers in foreign countries	9,406,000	7,731,000
NQA, Inc [Member]
Schedule of Equity Method Investments [Line Items]
Ownership percentage (in hundredths)	50.00%
Distribution of profits and losses (in hundredths)	50.10%
Distribution of profit and losses to non-controlling interest (in hundredths)	49.90%
XXCAL Japan [Member]
Schedule of Equity Method Investments [Line Items]
Ownership percentage (in hundredths)	50.00%
Equity method investments	392,000	627,000
Equity method investment recorded in the income statement	235,000	29,000
Net income attributable to noncontrolling interest	$ 976,000	$ 866,000

[1] Impairment loss of $1,791,000 is related to MSI.