Note 7 - Goodwill and Other Intangible Assets (Details) - Other Intangible Assets (USD $) In Thousands, unless otherwise specified	6 Months Ended	12 Months Ended
	Jun. 30, 2013	Dec. 31, 2012
Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross	$ 3,100	$ 3,100
Intangible Assets, Impairment Charge	(148)	(148)
Intangible Assets, Accumulated Amortization	(1,534)	(1,249)
Intangible Assets, Net	1,418	1,703
Patents [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible Assets Estimated Useful Life (in months)	57 months	57 months
Intangible Assets, Gross	2,700	2,700
Intangible Assets, Accumulated Amortization	(1,282)	(997)
Intangible Assets, Net	1,418	1,703
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible Assets Estimated Useful Life (in months)	33 months	33 months
Intangible Assets, Gross	400	400
Intangible Assets, Impairment Charge	(148)	(148)
Intangible Assets, Accumulated Amortization	$ (252)	$ (252)