Note 10 - Intangible Assets, Net (Details Textual) - USD ($)	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Amortization of Intangible Assets	$ 303,000	$ 311,000
Finite-Lived Intangible Asset, Useful Life	6 years 109 days
Finite-Lived Intangible Assets, Amortization Expense, Year Three	$ 1,185,000
Finite-Lived Intangible Assets, Amortization Expense, Remainder of Fiscal Year	897,000
Finite-Lived Intangible Assets, Amortization Expense, Year Two	1,185,000
Finite-Lived Intangible Assets, Amortization Expense, Year Five	1,116,000
Finite-Lived Intangible Assets, Amortization Expense, Year Four	1,185,000
Impairment of Intangible Assets, Finite-lived	$ 0