Note 17 - Segment Information (Details) - Reconciliation of Segment Operating Results - USD ($)		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Reconciliation of Segment Operating Results [Abstract]
Income from operations		$ 9,646,000	$ 8,650,000	$ 9,671,000
Unallocated corporate, general and administrative expenses *	[1]	(2,156,000)	(2,161,000)	(2,368,000)
Proxy contest related expenses				(1,403,000)
Equity-based compensation expenses		(5,092,000)	(5,359,000)	(4,159,000)
Intangible assets amortization expenses		(1,284,000)	(1,573,000)	(1,672,000)
Write–off of expired option related to investment in other company		(400,000)	0
Financial income, net		1,175,000	1,204,000	2,457,000
Total consolidated income before taxes		$ 1,889,000	$ 761,000	$ 2,526,000

[1] Includes mainly legal, accounting, board of directors and investors relation expenses.