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Note 15 - Industry Segments (Details) - Industry Segments – Operating Information (USD $) | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013
Segment Reporting Information [Line Items] |  |
Revenue | $ 14,586,000 us-gaap_Revenues | $ 16,318,000 us-gaap_Revenues
Operating income (loss) | (1,181,000)us-gaap_OperatingIncomeLoss | 444,000 us-gaap_OperatingIncomeLoss
Corporate expenses | 2,914,000 us-gaap_GeneralAndAdministrativeExpense | 2,680,000 us-gaap_GeneralAndAdministrativeExpense
Depreciation and amortization | 398,000 us-gaap_DepreciationAndAmortization | 435,000 us-gaap_DepreciationAndAmortization
Capital expenditures | 277,000 us-gaap_PaymentsToAcquirePropertyPlantAndEquipment | 559,000 us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
Identifiable assets | 9,205,000 us-gaap_Assets | 10,627,000 us-gaap_Assets
Information Technology [Member] |  |
Segment Reporting Information [Line Items] |  |
Revenue | 4,188,000 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = ins_InformationTechnologyMember | 4,202,000 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = ins_InformationTechnologyMember
Operating income (loss) | (1,879,000)us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = ins_InformationTechnologyMember | (1,290,000)us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = ins_InformationTechnologyMember
Depreciation and amortization | 150,000 us-gaap_DepreciationAndAmortization / us-gaap_StatementBusinessSegmentsAxis = ins_InformationTechnologyMember | 189,000 us-gaap_DepreciationAndAmortization / us-gaap_StatementBusinessSegmentsAxis = ins_InformationTechnologyMember
Capital expenditures | 190,000 us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / us-gaap_StatementBusinessSegmentsAxis = ins_InformationTechnologyMember | 174,000 us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / us-gaap_StatementBusinessSegmentsAxis = ins_InformationTechnologyMember
Identifiable assets | 1,621,000 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = ins_InformationTechnologyMember | 1,725,000 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = ins_InformationTechnologyMember
Industrial Products [Member] |  |
Segment Reporting Information [Line Items] |  |
Revenue | 10,398,000 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = ins_IndustrialProductsMember | 12,116,000 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = ins_IndustrialProductsMember
Operating income (loss) | 2,021,000 us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = ins_IndustrialProductsMember | 3,074,000 us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = ins_IndustrialProductsMember
Depreciation and amortization | 243,000 us-gaap_DepreciationAndAmortization / us-gaap_StatementBusinessSegmentsAxis = ins_IndustrialProductsMember | 240,000 us-gaap_DepreciationAndAmortization / us-gaap_StatementBusinessSegmentsAxis = ins_IndustrialProductsMember
Capital expenditures | 87,000 us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / us-gaap_StatementBusinessSegmentsAxis = ins_IndustrialProductsMember | 380,000 us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / us-gaap_StatementBusinessSegmentsAxis = ins_IndustrialProductsMember
Identifiable assets | 5,357,000 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = ins_IndustrialProductsMember | 6,716,000 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = ins_IndustrialProductsMember
Operating Segments [Member] |  |
Segment Reporting Information [Line Items] |  |
Revenue | 14,586,000 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = ins_OperatingSegments1Member | 16,318,000 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = ins_OperatingSegments1Member
Operating income (loss) | 142,000 us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = ins_OperatingSegments1Member | 1,784,000 us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = ins_OperatingSegments1Member
Depreciation and amortization | 393,000 us-gaap_DepreciationAndAmortization / us-gaap_StatementBusinessSegmentsAxis = ins_OperatingSegments1Member | 429,000 us-gaap_DepreciationAndAmortization / us-gaap_StatementBusinessSegmentsAxis = ins_OperatingSegments1Member
Capital expenditures | 277,000 us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / us-gaap_StatementBusinessSegmentsAxis = ins_OperatingSegments1Member | 554,000 us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / us-gaap_StatementBusinessSegmentsAxis = ins_OperatingSegments1Member
Identifiable assets | 6,978,000 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = ins_OperatingSegments1Member | 8,441,000 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = ins_OperatingSegments1Member
Corporate Segment [Member] |  |
Segment Reporting Information [Line Items] |  |
Corporate expenses | (1,323,000)us-gaap_GeneralAndAdministrativeExpense / us-gaap_StatementBusinessSegmentsAxis = us-gaap_CorporateMember | (1,340,000)us-gaap_GeneralAndAdministrativeExpense / us-gaap_StatementBusinessSegmentsAxis = us-gaap_CorporateMember
Depreciation and amortization | 5,000 us-gaap_DepreciationAndAmortization / us-gaap_StatementBusinessSegmentsAxis = us-gaap_CorporateMember | 6,000 us-gaap_DepreciationAndAmortization / us-gaap_StatementBusinessSegmentsAxis = us-gaap_CorporateMember
Capital expenditures |  | 5,000 us-gaap_PaymentsToAcquirePropertyPlantAndEquipment / us-gaap_StatementBusinessSegmentsAxis = us-gaap_CorporateMember
Identifiable assets | $ 2,227,000 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = us-gaap_CorporateMember | $ 2,186,000 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = us-gaap_CorporateMember

X
- Definition Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.18) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 12 -Article 7 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 18 -Article 5 + Details
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- Definition The current period expense charged against earnings on long-lived, physical assets not used in production, and which are not intended for resale, to allocate or recognize the cost of such assets over their useful lives; or to record the reduction in book value of an intangible asset over the benefit period of such asset; or to reflect consumption during the period of an asset that is not used in production. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 + Details
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- Definition The aggregate total of expenses of managing and administering the affairs of an entity, including affiliates of the reporting entity, which are not directly or indirectly associated with the manufacture, sale or creation of a product or product line. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.4) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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- Definition The net result for the period of deducting operating expenses from operating revenues. + References No definition available. + Details
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- Definition The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585 + Details
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- Definition Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 + Details
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