Significant Customers and Geographic Information (Tables)
 3 Months Ended
Apr. 30, 2013
Segment Reporting [Abstract]  
Schedule of Revenue by Major Customers by Reporting Segments [Table Text Block]

The following summarizes revenues by significant customer where such revenue exceeded 10% of total revenues for the indicated period:

 

    Three Months Ended  
    April 30,  
    2013     2012  
Customer A     18 %     16 %
Customer B     15 %     11 %
Customer C     14 %     N/A
Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area [Table Text Block]

The following table summarizes revenues by geographic locations:

 

    Three Months Ended  
    April 30,  
    2013     2012  
    Amount     %     Amount     %  
Revenues by customers' geographic locations:   (Amounts in thousands, except percentages)  
North America   $ 16,603       47 %   $ 23,428       64 %
Europe and Middle East     14,938       42 %     10,291       28 %
Latin America     3,127       9 %     2,754       8 %
Asia Pacific and other international locations     884       2 %     153       0 %
Total   $ 35,552             $ 36,626