Note 8 - Stock Repurchase Program - Schedule of Stock Purchases (Details) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended	3 Months Ended				8 Months Ended
	Dec. 31, 2016	Jul. 31, 2017	Apr. 30, 2017	Jan. 31, 2017	[1]	Jul. 31, 2017
Number of Shares Purchased (in shares)		0	80,426	49,920		130,346
Average Price Paid per Share (in dollars per share)	$ 0	$ 0	$ 0.27	$ 0.20		$ 0.25
Number of Shares Purchased as Part of Publicly Announced Plans or Programs (in shares)		0	80,426	49,920		130,346
Approximate Dollar Value of Shares That May Yet Be Purchased Under the Plans or Programs	$ 500	$ 468	$ 468	$ 490		$ 468

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