Note 15 - Due to Investors Related to Terminated Security Purchase Agreements (Details Textual)	12 Months Ended
	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Jan. 01, 2017	May 12, 2016
Number of Investors Security Purchase Agreement Terminated					2
Repayment for Security Purchase Agreement	$ 922,000	$ 0	$ 0
Security Purchase Agreement Termination Failure to Refund Amounts Annualized Interest Rate for Unpaid Amounts				12.00%
Jinrun Fangzhou [Member]
Common Stock Purchase Agreement Guarantee Payments Initial Payment Due Within Five Days Percentage		10.00%
Common Stock Purchase Agreement Guarantee Payment Due Within Thirty Days, Percentage		15.00%
Common Stock Purchase Agreement Guarantee Payment		$ 819,000
Dongsys Innovation [Member]
Common Stock Purchase Agreement Guarantee Payments Initial Payment Due Within Five Days Percentage		10.00%
Common Stock Purchase Agreement Guarantee Payment		$ 119,000