Note 13 - Non-vested Option Awards Activity (Details) - $ / shares	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Service Based Options [Member]
Balance at beginning of period, nonvested (in shares)	282,550
Weighted average grant date fair value, beginning of period, nonvested (in dollars per share)	$ 5.60
Nonvested Contractual Life	5 years 146 days	5 years 109 days
Granted (in shares)	154,000
Granted (in dollars per share)	$ 5.96
Granted	6 years 146 days
Vested (in shares)	(89,300)
Vested (in dollars per share)	$ 5.62
Vested	3 years 219 days
Forfeited (in shares)	(9,700)
Forfeited (in dollars per share)	$ 5.40
Forfeited	4 years 255 days
Balance at end of period, nonvested (in shares)	337,550	282,550
Weighted average grant date fair value, end of period, nonvested (in dollars per share)	$ 5.77	$ 5.60
Granted (in shares)	154,000
Granted (in dollars per share)	$ 5.96	$ 6.25
Forfeited (in shares)	(11,400)