Note 8 - Long-Term Debt (Detail) (USD $)	12 Months Ended
	Dec. 31, 2012
Minimum [Member] | Variable Interest Rate Notes [Member]
Debt Instrument, Periodic Payment (in Dollars)	$ 1,910
Minimum [Member] | Fixed Interest Rate Notes [Member]
Debt Instrument, Periodic Payment (in Dollars)	233
Minimum [Member]
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate	1.70%
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate	3.11%
Maximum [Member] | Variable Interest Rate Notes [Member]
Debt Instrument, Periodic Payment (in Dollars)	80,000
Maximum [Member] | Fixed Interest Rate Notes [Member]
Debt Instrument, Periodic Payment (in Dollars)	$ 94,697
Maximum [Member]
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate	3.10%
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate	8.50%