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Radyne Acquisition-Related Restructuring Plan Radyne Acquisition-Related Restructuring Plan - Wind-Down of Microsatellite Product Line (Details) (USD $)
Jan. 31, 2015
Restructuring reserve, current $ 34,000us-gaap_RestructuringReserveCurrent
Wind-Down of Microsatellite Product Line [Member]  
Restructuring reserve, current $ 229,000us-gaap_RestructuringReserveCurrent
/ us-gaap_RestructuringCostAndReserveAxis
= cmtl_MicrosatelliteProductLineMember