Note 13 - Stock Option Grants - Stock Option Activity (Details) - $ / shares	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Stock Options Outstanding, Number of Shares, Beginning Balance (in shares)	175,550	83,400
Stock Options Outstanding, Average Exercise Price, Beginning Balance (in dollars per share)	$ 8.17	$ 8.09
Stock Options Granted, Number of Shares (in shares)	97,000	96,150
Stock Options Granted, Average Exercise Price (in dollars per share)	$ 8.30	$ 8.23
Stock Options Exercised, Number of Shares (in shares)	0	0
Stock Options Exercised, Average Exercise Price (in dollars per share)	$ 0	$ 0
Stock Options Expired, Number of Shares (in shares)	0	0
Stock Options Expired, Average Exercise Price (in dollars per share)	$ 0	$ 0
Stock Options Forfeited, Number of Shares (in shares)	0	2,500
Stock Options Forfeited, Average Exercise Price (in dollars per share)	$ 0	$ 8.09
Stock Options Outstanding, Number of Shares, Ending (in shares)	272,550	177,050
Stock Options Outstanding, Average Exercise Price, Ending Balance (in dollars per share)	$ 8.21	$ 8.16
Options exercisable, end of period (in shares)	175,550	81,900
Options exercisable, end of period (in dollars per share)	$ 8.17	$ 8.09