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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

- Definition

Amount of consideration transferred under an asset purchase agreement, consisting of acquisition-date fair value of assets transferred to the acquirer and liabilities incurred by the acquirer.

+ References

No definition available.

+ Details

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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 measurement period used to determine the amount required to be paid to the seller of assets under an earnout clause included in an asset purchase agreement once the pre-determined revenue threshold has been exceeded.

+ References

No definition available.

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- Definition

The pre-established revenue threshold that, once exceeded, is used to determine the amount required to be paid to the seller of assets under an earnout clause included in an asset purchase agreement.

+ References

No definition available.

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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.

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- Definition

The book value of intangible assets disposed of as part of an asset purchase agreement.

+ References

No definition available.

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- Definition

Amount of liabilities assumed by the acquirer as part of an asset purchase agreement.

+ References

No definition available.

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- Definition

Amount of direct costs of the asset purchase agreement including legal, accounting, and other costs incurred to consummate the asset purchase agreement.

+ References

No definition available.

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- Definition

Amount of consideration received or receivable for the disposal of assets and liabilities, including discontinued operation.

+ References

No definition available.

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- Definition

Gain (loss) from sale or disposal of an organization or integrated set of activities (for example, but not limited to, a partnership or corporation) engaged in providing a product or service in a commercial, industrial, or professional environment.

+ References

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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

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- Definition

The cash inflow associated with the amount received from the sale of a portion of the company's business, for example a segment, division, branch or other business, during the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 12
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3179-108585

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