Note 5 - Amounts Recognized in Accumulated Other Comprehensive Income (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Net actuarial loss	$ (1,484,936)	$ (1,930,079)
Prior service cost
Amounts recognized in accumulated other comprehensive income (loss), before taxes	(1,484,936)	(1,930,079)
Income tax benefit	525,373	681,173
Amounts recognized in accumulated other comprehensive income (loss), after taxes	$ (959,563)	$ (1,248,906)