Note 1 - Summary of Business and Significant Accounting Policies (Details Textual) - USD ($)	12 Months Ended
	Jan. 31, 2018	Jan. 31, 2017	Jan. 31, 2016
Foreign Currency Transaction Gain (Loss), before Tax	$ (2,500,000)	$ (200,000)	$ 500,000
Allowance for Doubtful Accounts Receivable	396,000	1,090,000
Allowance for Doubtful Accounts Receivable, Write-offs	700,000
Depreciation, Depletion and Amortization	$ 4,600,000	4,300,000	4,000,000
Capitalized Software Amortization Period	3 years
Write-off of Fully Amortized Software Development Costs		3,700,000
Capitalized Computer Software, Amortization	$ 800,000	1,000,000	1,100,000
Capitalized Software Cost, Amortization Expense, New Twelve Months	445,000
Capitalized Software Cost, Amortization Expense, Year Two	365,000
Capitalized Software Cost, Amortization Expense, Year Three	180,000
Goodwill and Intangible Asset Impairment	0	0	0
Amortization of Intangible Assets	416,000	659,000	658,000
Advertising Expense	700,000	1,100,000	900,000
Research and Development Expense	$ 47,661,000	43,587,000	$ 41,237,000
Class Common Stock to Class B Common Stock Cash or Stock Dividends Payout Ratio	120.00%
Increase in Deferred Tax Assets [Member] | January 31, 2016 [Member]
Prior Period Reclassification Adjustment	$ 2,200,000
Increase in Deferred Tax Assets Valuation Allowance [Member] | January 31, 2016 [Member]
Prior Period Reclassification Adjustment	1,200,000
Offset to Accumulated Deficit [Member] | January 31, 2016 [Member]
Prior Period Reclassification Adjustment	1,000,000
Cumulative-effect Adjustment to Reduce Opening Accumulated Deficit [Member] | February 1, 2016 [Member]
Prior Period Reclassification Adjustment	400,000
Increase in Cash Provided By Operating Activities, and a Decrease in Cash Used in Financing Activities [Member] | January 31, 2016 [Member]
Prior Period Reclassification Adjustment	$ 800,000
Computer Equipment and Software [Member]
Property, Plant and Equipment, Useful Life	3 years
Furniture and Office Equipment [Member]
Property, Plant and Equipment, Useful Life	5 years
Building Improvements [Member]
Property, Plant and Equipment, Useful Life	10 years
Building [Member]
Property, Plant and Equipment, Useful Life	39 years
Leasehold Improvements [Member]
Property, Plant and Equipment, Useful Life	5 years
Fully Reserved Customer Accounts [Member]
Allowance for Doubtful Accounts Receivable		$ 700,000