Segment, Customer and Geographic Information - Result of Operations by Segments (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Results of operations by segments
REVENUES	$ 27,932	$ 26,471	$ 77,769	$ 78,290
GROSS PROFIT	11,394	10,776	31,826	30,917
OPERATING INCOME (LOSS)	2,096	928	2,219	(124)
Depreciation	723	660	2,086	2,006
Intangible amortization	465	596	1,503	1,804
Capital expenditures	596	650	1,884	1,930
Operating Segments [Member] | Connected Solutions [Member]
Results of operations by segments
REVENUES	18,697	18,318	52,409	56,874
GROSS PROFIT	5,803	5,684	16,635	17,352
OPERATING INCOME (LOSS)	2,262	1,738	5,278	4,872
Depreciation	426	444	1,267	1,361
Intangible amortization	261	392	891	1,181
Capital expenditures	241	457	811	1,087
Operating Segments [Member] | RF Solutions [Member]
Results of operations by segments
REVENUES	9,283	8,243	25,578	21,617
GROSS PROFIT	5,584	5,090	15,171	13,547
OPERATING INCOME (LOSS)	2,492	2,098	5,150	5,139
Depreciation	211	131	562	410
Intangible amortization	204	204	612	623
Capital expenditures	345	189	1,036	654
Corporate [Member]
Results of operations by segments
REVENUES	(48)	(90)	(218)	(201)
GROSS PROFIT	7	2	20	18
OPERATING INCOME (LOSS)	(2,658)	(2,908)	(8,209)	(10,135)
Depreciation	86	85	257	235
Intangible amortization	0	0	0	0
Capital expenditures	$ 10	$ 4	$ 37	$ 189