Note 13 - Stock Option Activity (Details)	3 Months Ended
	Mar. 31, 2016 $ / shares shares
Outstanding—shares underlying awards (in shares) | shares	227,449
Outstanding—weighted average exercise price (in dollars per share) | $ / shares	$ 6.68
Granted (in shares) | shares
Granted (in dollars per share) | $ / shares
Exercised (in shares) | shares
Exercised (in dollars per share) | $ / shares
Forfeited (in shares) | shares
Forfeited (in dollars per share) | $ / shares
Outstanding—shares underlying awards (in shares) | shares	227,449
Outstanding—weighted average exercise price (in dollars per share) | $ / shares	$ 6.68
Exercisable—March 31, 2016 (in shares) | shares	171,340
Exercisable—March 31, 2016 (in dollars per share) | $ / shares	$ 6.56