Annual report pursuant to Section 13 and 15(d)

Acquisition (Details)

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Acquisition (Details) (USD $)
 1 Months Ended 12 Months Ended 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Jul. 31, 2012
Max-Viz, Inc [Member]
Dec. 31, 2012
Max-Viz, Inc [Member]
Jul. 30, 2012
Max-Viz, Inc [Member]
Dec. 31, 2012
Ballard [Member]
Dec. 31, 2012
Ballard [Member]
Maximum [Member]
Acquisition (Textual) [Abstract]              
Percentage of acquired stock         100.00% 100.00%  
Purchase consideration in cash         $ 10,700,000 $ 23,900,000  
Target period of growth     3 years     5 years  
Acquisition Contingent Consideration (814,000) (720,000)     (8,000,000) (700,000) (5,500,000)
Business acquisition contingent purchase consideration         $ 100,000    
Goodwill and purchased intangible assets deductable for tax purposes period       15 years