Note 6 - Debt (Details) - Credit facility amended variable interest rate table	6 Months Ended
	Jun. 30, 2013
Base Rate [Member] | Greater than $8,000,000 [Member]
Note 6 - Debt (Details) - Credit facility amended variable interest rate table [Line Items]
Quarterly Average Undrawn Borrowing Availability	1.00%
Base Rate [Member] | From $5,000,000 up to $8,000,000 [Member]
Note 6 - Debt (Details) - Credit facility amended variable interest rate table [Line Items]
Quarterly Average Undrawn Borrowing Availability	1.25%
Base Rate [Member] | Less than $5,000,000 [Member]
Note 6 - Debt (Details) - Credit facility amended variable interest rate table [Line Items]
Quarterly Average Undrawn Borrowing Availability	1.50%
London Interbank Offered Rate (LIBOR) [Member] | Greater than $8,000,000 [Member]
Note 6 - Debt (Details) - Credit facility amended variable interest rate table [Line Items]
Quarterly Average Undrawn Borrowing Availability	2.00%
London Interbank Offered Rate (LIBOR) [Member] | From $5,000,000 up to $8,000,000 [Member]
Note 6 - Debt (Details) - Credit facility amended variable interest rate table [Line Items]
Quarterly Average Undrawn Borrowing Availability	2.25%
London Interbank Offered Rate (LIBOR) [Member] | Less than $5,000,000 [Member]
Note 6 - Debt (Details) - Credit facility amended variable interest rate table [Line Items]
Quarterly Average Undrawn Borrowing Availability	2.50%