Segment Information (Financial Information By Reportable Segment) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Segment Reporting Information [Line Items]
Revenue	$ 24,963	$ 30,521	$ 31,681
Gross profit	18,257	21,304	23,882
Goodwill impairment	3,175	11,685
Amortization of intangible assets	1,622	1,650	1,218
Intangible assets and goodwill	6,489	11,008	24,226
Autoscope [Member]
Segment Reporting Information [Line Items]
Revenue	16,031	17,445	16,659
Gross profit	14,010	15,096	15,054
Goodwill impairment		525
Intangible assets and goodwill			525
RTMS [Member]
Segment Reporting Information [Line Items]
Revenue	4,118	7,366	9,819
Gross profit	1,798	3,512	6,104
Goodwill impairment	1,372	7,392
Amortization of intangible assets	748	768	768
Intangible assets and goodwill	1,430	3,551	11,710
CitySync [Member]
Segment Reporting Information [Line Items]
Revenue	4,814	5,710	5,203
Gross profit	2,449	2,696	2,724
Goodwill impairment	1,803	3,768
Amortization of intangible assets	874	882	450
Intangible assets and goodwill	$ 5,059	$ 7,457	$ 11,991

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

+ References+ Details

Loss recognized during the period that results from the write-down of goodwill after comparing the implied fair value of reporting unit goodwill with the carrying amount of that goodwill. Goodwill is assessed at least annually for impairment.

+ References

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+ Details