Note 20 - Condensed Financial Statements of Parent Company - Balance Sheets (Details) (Parentheticals) - $ / shares	Dec. 31, 2017	Dec. 31, 2016	Oct. 11, 2016
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	100,000,000	100,000,000
Common stock, shares issued (in shares)	3,490,672	3,438,190
Common stock, shares outstanding (in shares)	3,490,672	3,438,190	3,438,190
Parent Company [Member]
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	100,000,000	100,000,000
Common stock, shares issued (in shares)	3,490,672	3,438,190
Common stock, shares outstanding (in shares)	3,490,672	3,438,190