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Note 3 - Acquisitions (Details) - Pro Forma Results of Operations - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
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Jan. 31, 2016 | Jan. 31, 2015 | Jan. 31, 2014
Pro Forma Results of Operations [Abstract] |  |  |
Revenues | $ 197,088 | $ 205,723 | $ 199,860
Net income | $ 22,391 | $ 16,830 | $ 8,223
Earnings per share |  |  |
Basic | $ 0.30 | $ 0.24 | $ 0.13
Diluted | $ 0.29 | $ 0.24 | $ 0.13

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