Note 13 - Subsequent Events - Accrued Stock Compensation (Details)	Dec. 31, 2019 shares
Total Shares Issued (in shares)	296,520	[1]
Stephen Chen [Member]
Total Shares Issued (in shares)	213,390	[1]
Bernard Cohen [Member]
Total Shares Issued (in shares)	25,607	[1]
Dr. Celee Spidel [Member]
Total Shares Issued (in shares)	6,309	[1]
i2China Mgt LLC [Member]
Total Shares Issued (in shares)	51,214
Share-based Compensation, Accrued Compensation Quarter Two [Member]
Total Shares Issued (in shares)	101,472
Share-based Compensation, Accrued Compensation Quarter Two [Member] | Stephen Chen [Member]
Total Shares Issued (in shares)	71,459
Share-based Compensation, Accrued Compensation Quarter Two [Member] | Bernard Cohen [Member]
Total Shares Issued (in shares)	8,575
Share-based Compensation, Accrued Compensation Quarter Two [Member] | Dr. Celee Spidel [Member]
Total Shares Issued (in shares)	4,288
Share-based Compensation, Accrued Compensation Quarter Two [Member] | i2China Mgt LLC [Member]
Total Shares Issued (in shares)	17,150
Share-based Compensation, Accrued Compensation Quarter Three [Member]
Total Shares Issued (in shares)	83,303
Share-based Compensation, Accrued Compensation Quarter Three [Member] | Stephen Chen [Member]
Total Shares Issued (in shares)	59,766
Share-based Compensation, Accrued Compensation Quarter Three [Member] | Bernard Cohen [Member]
Total Shares Issued (in shares)	7,172
Share-based Compensation, Accrued Compensation Quarter Three [Member] | Dr. Celee Spidel [Member]
Total Shares Issued (in shares)	2,021
Share-based Compensation, Accrued Compensation Quarter Three [Member] | i2China Mgt LLC [Member]
Total Shares Issued (in shares)	14,344
Share-based Compensation, Accrued Compensation Quarter Four [Member]
Total Shares Issued (in shares)	111,745
Share-based Compensation, Accrued Compensation Quarter Four [Member] | Stephen Chen [Member]
Total Shares Issued (in shares)	82,165
Share-based Compensation, Accrued Compensation Quarter Four [Member] | Bernard Cohen [Member]
Total Shares Issued (in shares)	9,860
Share-based Compensation, Accrued Compensation Quarter Four [Member] | Dr. Celee Spidel [Member]
Total Shares Issued (in shares)
Share-based Compensation, Accrued Compensation Quarter Four [Member] | i2China Mgt LLC [Member]
Total Shares Issued (in shares)	19,720

[1] Total number of shares reserved for the compensation accrued in 2019 and total number of shares issued on February 15, 2020 for 2019 stock compensation.