Note 1 - Concentration of Credit Risk (Details) - Sales Revenue, Net [Member] - Customer Concentration Risk [Member] - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Huawei Technologies [Member]
Net sales, amount	$ 12,077	$ 18,718	$ 15,731
Concentration Risk, Percentage	21.00%	22.00%	12.00%
Richardson-RFPD [Member]
Net sales, amount	$ 9,758
Concentration Risk, Percentage	17.00%
Alltek Technologies [Member]
Net sales, amount	$ 7,314
Concentration Risk, Percentage	12.00%
Samsung Electronics [Member]
Net sales, amount		$ 22,479	$ 54,187
Concentration Risk, Percentage		26.00%	40.00%
Murata [Member]
Net sales, amount			$ 14,274
Concentration Risk, Percentage			11.00%

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 18
-URI http://asc.fasb.org/extlink&oid=51801978&loc=d3e6351-108592

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=49121117&loc=d3e13531-108611

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=51801978&loc=d3e6404-108592

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 21
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=49121117&loc=d3e13537-108611

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