Note 5 - Restructuring (Details) (USD $)	3 Months Ended		9 Months Ended										9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014 Employee Severance [Member] October 2012 Plan [Member]	Sep. 30, 2014 Employee Severance [Member] October 2008 Plan [Member]	Sep. 30, 2014 Facility Closing [Member] October 2008 Plan [Member]	Sep. 30, 2014 October 2012 Plan [Member]	Dec. 31, 2013 October 2012 Plan [Member]	Sep. 30, 2013 October 2012 Plan [Member]	Jun. 30, 2013 October 2012 Plan [Member]	Dec. 31, 2012 October 2012 Plan [Member]	Sep. 30, 2013 October 2008 Plan [Member]	Sep. 30, 2014 October 2008 Plan [Member]	Jun. 30, 2013 October 2008 Plan [Member]	Dec. 31, 2012 October 2008 Plan [Member]
Note 5 - Restructuring (Details) [Line Items]
Restructuring Charges	$ 0	$ 8,000	$ 57,000	$ (35,000)									$ (102,000)
Restructuring Reserve	0		0						13,000	49,000	66,000	896,000			105,000	448,000
Restructuring and Related Cost, Cost Incurred to Date					$ 2,100,000	$ 4,700,000	$ 2,700,000	$ 2,200,000						$ 7,400,000