Note 2 - Significant Accounting Policies (Details) - Accumulated Other Comprehensive Income (Loss) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	$ 988
Other comprehensive income (loss) before reclassifications	45
Amounts reclassified from accumulated other comprehensive income (loss)	(1,854)
Net current period other comprehensive income (loss)	(1,809)	2,744	(2,111)
Ending balance	(821)	988
Accumulated Net Unrealized Investment Gain (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	922
Other comprehensive income (loss) before reclassifications	(304)
Amounts reclassified from accumulated other comprehensive income (loss)	(1,009)
Net current period other comprehensive income (loss)	(1,313)
Ending balance	(391)
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	484
Other comprehensive income (loss) before reclassifications	372
Amounts reclassified from accumulated other comprehensive income (loss)	(856)
Net current period other comprehensive income (loss)	(484)
Accumulated Defined Benefit Plans Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(237)
Other comprehensive income (loss) before reclassifications	(11)
Amounts reclassified from accumulated other comprehensive income (loss)	11
Ending balance	(237)
Accumulated Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(181)
Other comprehensive income (loss) before reclassifications	(12)
Net current period other comprehensive income (loss)	(12)
Ending balance	$ (193)