Note 8 - Stock Repurchase Program (Details Textual) - USD ($) $ in Millions	3 Months Ended					11 Months Ended
	Oct. 31, 2017	Jul. 31, 2017	Apr. 30, 2017	Jan. 31, 2017	[1]	Oct. 31, 2017	Dec. 31, 2016
Stock Repurchase Program, Authorized Amount							$ 0.5
Treasury Stock, Shares, Acquired	8,607	0	80,426	49,920		138,953

[1] 49,920 shares of common stock purchased were purchased through a private transaction