Note 4 - Fair Value: Fair Value Measurements, by Fair Value hierarchy (Details) - USD ($)	Sep. 30, 2015	Dec. 31, 2014
Investments, Fair Value Disclosure	$ 135,625,042	$ 132,847,073
Corporate Debt Securities
Investments, Fair Value Disclosure	339,755	418,987
US States and Political Subdivisions Debt Securities
Investments, Fair Value Disclosure	135,285,287	132,428,086
Fair Value, Inputs, Level 1
Investments, Fair Value Disclosure	339,755	418,987
Fair Value, Inputs, Level 1 | Corporate Debt Securities
Investments, Fair Value Disclosure	339,755	418,987
Fair Value, Inputs, Level 2
Investments, Fair Value Disclosure	135,625,042	132,428,086
Fair Value, Inputs, Level 2 | US States and Political Subdivisions Debt Securities
Investments, Fair Value Disclosure	$ 135,285,287	$ 132,428,086