Note 10 - Related Party (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Ameritas Life Insurance Corp [Member]
Note 10 - Related Party (Details) [Line Items]
Related Party Transaction, Amounts of Transaction	$ 207,000	$ 212,000	$ 198,000
Nebraska Global Investment Company LLC [Member] | Chief Executive Officer [Member]
Note 10 - Related Party (Details) [Line Items]
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners	14.00%
Nebraska Global Investment Company LLC [Member]
Note 10 - Related Party (Details) [Line Items]
Related Party Transaction, Amounts of Transaction	$ 0	$ 57,000	$ 55,000