Operating Segments - Reconciliation of Segment Financial Data (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Net sales	$ 31,898	$ 34,047
Gross profit	9,715	10,006
Depreciation and amortization	474	413
Operating income (loss)	249	(55)
Total assets	26,459	24,398
Communications Equipment [Member]
Total assets	6,266
Electronic Devices [Member]
Net sales	21,717	24,036
Gross profit	6,280	7,085
Depreciation and amortization	288	237
Operating income (loss)	2,681	3,355
Total assets	20,134	17,222
Communications Equipment [Member]
Net sales	10,181	10,011
Gross profit	3,435	2,921
Depreciation and amortization	176	172
Operating income (loss)	46	(703)
Total assets		7,018
Corporate And Other [Member]
Operating income (loss)	(2,478)	(2,707)
Total assets	59	158
All Other [Member]
Depreciation and amortization	$ 10	$ 4