Note 14 - Consolidated Net Sales and Long-lived Asset Information by Geographic Area (Details) - Reportable Geographical Components [Member] - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
UNITED STATES
Net sales by geographic region
Consolidated sales	$ 43,753,000	$ 45,714,000
Long-lived assets by geographic region
Consolidated long-lived assets	2,564,000	2,944,000
International Member
Net sales by geographic region
Consolidated sales	1,202,000	1,935,000
Long-lived assets by geographic region
Consolidated long-lived assets	343,000	371,000
Consolidated sales	44,955,000	47,649,000
Consolidated long-lived assets	$ 2,907,000	$ 3,315,000