XML 14 R46.htm IDEA: XBRL DOCUMENT v2.4.0.6
Commitments and Contingencies (Details) (USD $)
9 Months Ended
Sep. 30, 2012
Oct. 02, 2011
Dec. 31, 2011
Commitments and Contingencies (Textual) [Abstract]      
Warranty liability $ 1,046,000   $ 914,000
Warranty expense 327,000 226,000  
Period of extended warranty for link encryption products 3 years    
Period of extended warranty for link encryption products 5 years    
Deferred extended warranties 2,812,000   2,536,000
Outstanding purchase commitments 7,276,000    
Outstanding letters of credit $ 990,000