Note 9 - Stockholders' Equity (Details Textual) - USD ($) $ in Thousands			6 Months Ended
	Feb. 18, 2015	Jan. 22, 2015	Jul. 31, 2016	Jul. 31, 2015
Common Class A [Member]
Stock Issued During Period, Shares, New Issues	450,000	2,000,000
Proceeds from Issuance of Common Stock	$ 8,400	$ 37,000
Proceeds from Issuance of Common Stock				$ 8,365