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Credit Facilities (Details Narrative) (Alliance Bank [Member], Revolving Credit Facility [Member], USD $)
In Thousands, unless otherwise specified
0 Months Ended 3 Months Ended
May 12, 2014
Mar. 31, 2015
Alliance Bank [Member] | Revolving Credit Facility [Member]
   
Maxiumum borrowing line of credit capacity $ 5,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ us-gaap_CreditFacilityAxis
= us-gaap_RevolvingCreditFacilityMember
/ us-gaap_LineOfCreditFacilityAxis
= isns_AllianceBankMember
 
Interest rate 3.95%us-gaap_LineOfCreditFacilityInterestRateDuringPeriod
/ us-gaap_CreditFacilityAxis
= us-gaap_RevolvingCreditFacilityMember
/ us-gaap_LineOfCreditFacilityAxis
= isns_AllianceBankMember
 
Description of collateral  

Any advances are secured by the Company’s inventories, accounts receivable, cash, marketable securities, and equipment. 

Expiration   Apr. 01, 2016