Note 7 - Credit Facility (Details) (USD $) In Millions, unless otherwise specified			3 Months Ended
	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2014 Minimum [Member] London Interbank Offered Rate (LIBOR) [Member] Line of Credit [Member]	Mar. 31, 2014 Minimum [Member]	Mar. 31, 2014 Maximum [Member] London Interbank Offered Rate (LIBOR) [Member] Line of Credit [Member]	Mar. 31, 2014 Maximum [Member]
Note 7 - Credit Facility (Details) [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity (in Dollars)	$ 5.0
Debt Instrument, Basis Spread on Variable Rate			1.00%		1.50%
Line of Credit Facility, Amount Outstanding (in Dollars)	$ 3.5	$ 3.5
Line of Credit Facility, Interest Rate at Period End	1.70%	1.70%
Line of Credit Facility, Commitment Fee Percentage				0.25%		0.75%