Note 8 - Customer and Geographic Information (Details) - Revenue by Geographical Areas (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Note 8 - Customer and Geographic Information (Details) - Revenue by Geographical Areas [Line Items]
Revenue by geographical areas	$ 27,086	$ 24,110
Geographic Concentration Risk [Member] | North America [Member] | Sales Revenue, Net [Member]
Note 8 - Customer and Geographic Information (Details) - Revenue by Geographical Areas [Line Items]
Revenue percentage by geographical areas	42.00%	41.00%
Geographic Concentration Risk [Member] | GERMANY | Sales Revenue, Net [Member]
Note 8 - Customer and Geographic Information (Details) - Revenue by Geographical Areas [Line Items]
Revenue percentage by geographical areas	34.00%	19.00%
Geographic Concentration Risk [Member] | KOREA, REPUBLIC OF | Sales Revenue, Net [Member]
Note 8 - Customer and Geographic Information (Details) - Revenue by Geographical Areas [Line Items]
Revenue percentage by geographical areas	8.00%	21.00%
Geographic Concentration Risk [Member] | JAPAN | Sales Revenue, Net [Member]
Note 8 - Customer and Geographic Information (Details) - Revenue by Geographical Areas [Line Items]
Revenue percentage by geographical areas	6.00%	9.00%
Geographic Concentration Risk [Member] | Rest of Asia [Member] | Sales Revenue, Net [Member]
Note 8 - Customer and Geographic Information (Details) - Revenue by Geographical Areas [Line Items]
Revenue percentage by geographical areas	6.00%	6.00%
Geographic Concentration Risk [Member] | Rest of Europe [Member] | Sales Revenue, Net [Member]
Note 8 - Customer and Geographic Information (Details) - Revenue by Geographical Areas [Line Items]
Revenue percentage by geographical areas	4.00%	4.00%
Geographic Concentration Risk [Member] | Sales Revenue, Net [Member]
Note 8 - Customer and Geographic Information (Details) - Revenue by Geographical Areas [Line Items]
Revenue percentage by geographical areas	100.00%	100.00%
North America [Member]
Note 8 - Customer and Geographic Information (Details) - Revenue by Geographical Areas [Line Items]
Revenue by geographical areas	11,399	9,866
GERMANY
Note 8 - Customer and Geographic Information (Details) - Revenue by Geographical Areas [Line Items]
Revenue by geographical areas	9,100	4,625
KOREA, REPUBLIC OF
Note 8 - Customer and Geographic Information (Details) - Revenue by Geographical Areas [Line Items]
Revenue by geographical areas	2,260	4,912
JAPAN
Note 8 - Customer and Geographic Information (Details) - Revenue by Geographical Areas [Line Items]
Revenue by geographical areas	1,713	2,261
Rest of Asia [Member]
Note 8 - Customer and Geographic Information (Details) - Revenue by Geographical Areas [Line Items]
Revenue by geographical areas	1,495	1,544
Rest of Europe [Member]
Note 8 - Customer and Geographic Information (Details) - Revenue by Geographical Areas [Line Items]
Revenue by geographical areas	$ 1,119	$ 902