Note 15 - Summary of RSU Activity (Details) - Restricted Stock Units (RSUs) [Member]	12 Months Ended
	Dec. 31, 2015 $ / shares shares
Balance, outstanding shares (in shares) | shares	113,961
Balance (in dollars per share) | $ / shares	$ 4.96
Granted (in shares) | shares	122,534
Granted (in dollars per share) | $ / shares	$ 4.71
Vested (in shares) | shares	(65,712)
Vested (in dollars per share) | $ / shares	$ 4.96
Forfeited or cancelled (in shares) | shares	(15,022)
Forfeited or cancelled (in dollars per share) | $ / shares	$ 4.96
Balance, outstanding shares (in shares) | shares	155,761
Balance (in dollars per share) | $ / shares	$ 4.78