Note 3 - Basic and Diluted Shares - Antidilutive Securities (Details) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Basic and diluted (in shares)	18,914,307	18,852,479	18,935,635	18,831,499
Potentially dilutive (in shares)	25,281	27,500	25,281	27,500