XML 15 R37.htm IDEA: XBRL DOCUMENT v2.4.1.9
Restructuring (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Restructuring Reserve [Roll Forward]    
Balance at beginning of period $ 216us-gaap_RestructuringReserve  
Charges 119us-gaap_RestructuringCharges 460us-gaap_RestructuringCharges
Payments/Settlements (303)us-gaap_PaymentsForRestructuring (222)us-gaap_PaymentsForRestructuring
Balance at end of period 32us-gaap_RestructuringReserve 238us-gaap_RestructuringReserve
Termination Benefits [Member]    
Restructuring Reserve [Roll Forward]    
Balance at beginning of period 190us-gaap_RestructuringReserve
/ us-gaap_RestructuringCostAndReserveAxis
= us-gaap_EmployeeSeveranceMember
 
Charges (119)us-gaap_RestructuringCharges
/ us-gaap_RestructuringCostAndReserveAxis
= us-gaap_EmployeeSeveranceMember
60us-gaap_RestructuringCharges
/ us-gaap_RestructuringCostAndReserveAxis
= us-gaap_EmployeeSeveranceMember
Payments/Settlements 295us-gaap_PaymentsForRestructuring
/ us-gaap_RestructuringCostAndReserveAxis
= us-gaap_EmployeeSeveranceMember
(45)us-gaap_PaymentsForRestructuring
/ us-gaap_RestructuringCostAndReserveAxis
= us-gaap_EmployeeSeveranceMember
Balance at end of period 14us-gaap_RestructuringReserve
/ us-gaap_RestructuringCostAndReserveAxis
= us-gaap_EmployeeSeveranceMember
15us-gaap_RestructuringReserve
/ us-gaap_RestructuringCostAndReserveAxis
= us-gaap_EmployeeSeveranceMember
Facility Costs And Contract Termination [Member]    
Restructuring Reserve [Roll Forward]    
Balance at beginning of period 26us-gaap_RestructuringReserve
/ us-gaap_RestructuringCostAndReserveAxis
= isns_FacilityCostsAndContractTerminationMember
 
Charges   400us-gaap_RestructuringCharges
/ us-gaap_RestructuringCostAndReserveAxis
= isns_FacilityCostsAndContractTerminationMember
Payments/Settlements (8)us-gaap_PaymentsForRestructuring
/ us-gaap_RestructuringCostAndReserveAxis
= isns_FacilityCostsAndContractTerminationMember
(177)us-gaap_PaymentsForRestructuring
/ us-gaap_RestructuringCostAndReserveAxis
= isns_FacilityCostsAndContractTerminationMember
Balance at end of period $ 18us-gaap_RestructuringReserve
/ us-gaap_RestructuringCostAndReserveAxis
= isns_FacilityCostsAndContractTerminationMember
$ 223us-gaap_RestructuringReserve
/ us-gaap_RestructuringCostAndReserveAxis
= isns_FacilityCostsAndContractTerminationMember