Note 5 - Prepaid Expenses and Other Current Assets (Details) - USD ($) $ in Thousands	Oct. 31, 2015	Jan. 31, 2015
Deposits	$ 3,221	$ 3,124
Short-term promissory notes	2,710
Prepayments for inventory	1,685	$ 1,670
Prepayments for royalties	741	659
R&D credit receivable	576	583
Other current assets	2,771	2,769
Total prepaid expenses and other current assets	$ 11,704	$ 8,805