Note 10 - Intangible Assets, Net (Details Textual) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Amortization of Intangible Assets, Total	$ 168,000	$ 304,000	$ 336,000	$ 607,000
Impairment of Intangible Assets, Finite-lived	1,878,000		$ 1,878,000
Finite-Lived Intangible Asset, Useful Life			7 years 302 days
Finite-Lived Intangible Assets, Amortization Expense, Remainder of Fiscal Year	108,000		$ 108,000
Finite-Lived Intangible Assets, Amortization Expense, Year Two	215,000		215,000
Finite-Lived Intangible Assets, Amortization Expense, Year Four	206,000		206,000
Finite-Lived Intangible Assets, Amortization Expense, Year Five	196,000		196,000
Finite-Lived Intangible Assets, Amortization Expense, Year Three	215,000		215,000
Intelligent Marketing Data Service Platform and Cloud Video Management System [Member]
Impairment of Intangible Assets, Finite-lived	$ 1,880,000		$ 1,880,000