Note 10 - Stock Option Activity (Details) - $ / shares	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2015
Outstanding, Number of Options (in shares)	20,170
Outstanding, Weighted Average Remaining Contractual Term (in dollars per share)	$ 32.63
Canceled (in shares)	(1,000)
Canceled (in dollars per share)	$ 32.63
Outstanding, Number of Options (in shares)	19,170
Outstanding, Weighted Average Remaining Contractual Term (in dollars per share)	$ 32.63
Outstanding, Weighted Average Remaining Contractual Term	1 year 109 days
Exercisable at December 31, 2015 (in shares)		19,170
Exercisable at December 31, 2015 (in dollars per share)	$ 32.63	$ 32.63
Exercisable at December 31, 2015	1 year 109 days