Note 11 - Share Based Compensation - Nonvested Stock Options Outstanding (Details)	12 Months Ended
	Dec. 31, 2016 $ / shares shares
Nonvested, shares (in shares) | shares	15,000
Nonvested, weighted-average grant-date fair value (in dollars per share) | $ / shares	$ 2.33
Vested, shares (in shares) | shares
Vested, weighted average grant date fair value (in dollars per share) | $ / shares
Forfeited, shares (in shares) | shares
Forfeited, weighted-average grant-date fair value (in dollars per share) | $ / shares
Issued nonvested, shares (in shares) | shares
Issued nonvested, weighted-average grant-date fair value (in dollars per share) | $ / shares
Nonvested, shares (in shares) | shares	15,000
Nonvested, weighted-average grant-date fair value (in dollars per share) | $ / shares	$ 2.33