Note 11 - Stock Option Plan (Details) - $ / shares	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
The 1989 Non-qualified Stock Option Plan [Member]
Beginning balance, number outstanding (in shares)	35,250	35,250
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross	0	0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	0	0
Canceled during period (in shares)	0	0
Ending balance, number outstanding (in shares)	35,250	35,250
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number	35,250	35,250
Beginning balance, number outstanding, weighted average exercise price (in dollars per share)	$ 4.62	$ 4.62
Granted during period, weighted average exercise price (in dollars per share)	0	0
Exercised during period, weighted average exercise price (in dollars per share)	0	0
Canceled during period, weighted average exercise price (in dollars per share)	0	0
Ending balance, number outstanding, weighted average exercise price (in dollars per share)	4.62	4.62
Beginning balance, number exercisable, weighted average exercise price (in dollars per share)	$ 4.62	$ 4.62
The 2001 Non-qualified Stock Option Plan [Member]
Beginning balance, number outstanding (in shares)	124,480	152,480
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross	0	0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	0	28,000
Canceled during period (in shares)	0	0
Ending balance, number outstanding (in shares)	124,480	124,480
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number	111,980	111,980
Beginning balance, number outstanding, weighted average exercise price (in dollars per share)	$ 4.57	$ 4.35
Granted during period, weighted average exercise price (in dollars per share)	0	0
Exercised during period, weighted average exercise price (in dollars per share)	0	0
Canceled during period, weighted average exercise price (in dollars per share)	0	0
Ending balance, number outstanding, weighted average exercise price (in dollars per share)	4.57	4.57
Beginning balance, number exercisable, weighted average exercise price (in dollars per share)	$ 4.56	$ 4.56
The 2007 Share Incentive Plan [Member]
Beginning balance, number outstanding (in shares)	100,000	0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross	0	100,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	0	0
Canceled during period (in shares)	0	0
Ending balance, number outstanding (in shares)	100,000	100,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number	0	0
Beginning balance, number outstanding, weighted average exercise price (in dollars per share)		$ 11.17
Granted during period, weighted average exercise price (in dollars per share)
Exercised during period, weighted average exercise price (in dollars per share)
Canceled during period, weighted average exercise price (in dollars per share)
Ending balance, number outstanding, weighted average exercise price (in dollars per share)	$ 11.17
Beginning balance, number exercisable, weighted average exercise price (in dollars per share)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	0	28,000
Ending balance, number outstanding (in shares)	259,730
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number	159,730