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Note 5 - Sale of Business Component (Details Textual) - USD ($) |  |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Jan. 31, 2017 | Sep. 28, 2016 | Mar. 31, 2017 | Dec. 31, 2017 | Dec. 31, 2016
Proceeds from Divestiture of Businesses |  |  |  | $ 314,000 | $ 792,000
Gain (Loss) on Disposition of Business |  |  |  | $ 321,000 | 910,000
Tech Site Services LLC [Member] |  |  |  |  |
Asset Purchase Agreement, Consideration Transferred | $ 350,000 |  |  |  |
Asset Purchase Agreement, Earnout Payment, Fee for Revenues Exceeding Measurement Period Revenue Threshold, Percentage | 10.00% |  |  |  |
Asset Purchase Agreement, Earnout Payment, Measurement Period Revenue Threshold | $ 2,500,000 |  |  |  |
Asset Purchase Agreement, Earnout Payment, Measurement Period | 1 year |  |  |  |
Asset Purchase Agreement, Earnout Payment, Period of Potential Payment | 2 years |  |  |  |
Payments for Rent |  |  |  |  | 253,000
Asset Purchase Agreement, Liabilities Assumed | $ 7,000 |  |  |  |
Proceeds from Divestiture of Businesses | 343,000 |  |  |  |
Asset Purchase Agreement, Transaction Costs | 29,000 |  |  |  |
Gain (Loss) on Disposition of Business |  |  | $ 321,000 |  |
Tech Site Services LLC [Member] | Maryland-based Facilities Maintenance Business [Member] | Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] |  |  |  |  |
Asset Purchase Agreement, Consideration Transferred |  | $ 950,000 |  |  |
Asset Purchase Agreement, Liabilities Assumed |  | 308,000 |  |  |
Asset Purchase Agreement, Transaction Costs |  | 40,000 |  |  |
Gain (Loss) on Disposition of Business |  |  |  |  | $ 910,000
Disposal Group, Including Discontinued Operation, Consideration |  | 642,000 |  |  |
Tech Site Services LLC [Member] | Customer Contracts and Intellectual Property [Member] |  |  |  |  |
Asset Purchase Agreement, Intangible Assets Disposed of, Book Value | $ 0 |  |  |  |
Tech Site Services LLC [Member] | Customer Contracts and Intellectual Property [Member] | Maryland-based Facilities Maintenance Business [Member] | Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] |  |  |  |  |
Asset Purchase Agreement, Intangible Assets Disposed of, Book Value |  | $ 0 |  |  |

X
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- Definition The percentage of revenue exceeding a pre-established revenue threshold that is required to be paid to the seller of assets under an earnout clause included in an asset purchase agreement. + References No definition available. + Details
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- Definition The period following the close of an asset purchase agreement in which the seller of assets may receive payments under an earnout clause included in an asset purchase agreement once the pre-determined revenue threshold has been exceeded. + References No definition available. + Details
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- Definition The book value of intangible assets disposed of as part of an asset purchase agreement. + References No definition available. + Details
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- Definition Amount of liabilities assumed by the acquirer as part of an asset purchase agreement. + References No definition available. + Details
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- Definition Cash payments to lessor's for use of assets under operating leases. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3536-108585 + Details
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