Note 8 - Fair Value Measurements (Details) - The following tables present our assets and liabilities that are measured at fair value on a recurri (USD $) In Thousands, unless otherwise specified	6 Months Ended	12 Months Ended
	Jun. 30, 2013	Dec. 31, 2012
Assets:
Balance Sheet Classification	Other noncurrent assets	Other noncurrent assets
Fair Value Measurements	$ 1,561	$ 1,459
Liabilities:
Balance Sheet Classification	Other long-term liabilities	Other long-term liabilities
Fair Value Measurements	19	60
Fair Value, Inputs, Level 1 [Member]
Assets:
Fair Value Measurements	1,561	1,459
Fair Value, Inputs, Level 2 [Member]
Liabilities:
Fair Value Measurements	$ 19	$ 60