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Note 13 - Purchase of Interests in Subsidiaries (Details Textual) - USD ($) |  | 12 Months Ended
--- | --- | ---
Jan. 09, 2018 | Dec. 31, 2018 | Dec. 31, 2017
Payments to Acquire Businesses, Net of Cash Acquired, Total |  | $ (767,000) |
Long-term Debt, Maturities, Repayments of Principal in Year Two |  | 487,000 |
Revenue from Contract with Customer, Including Assessed Tax |  | 229,191,000 | 181,381,000
Net Income (Loss) Attributable to Parent, Total |  | (1,551,000) | $ (923,000)
Resource Plus, Inc [Member] |  |  |
Revenue from Contract with Customer, Including Assessed Tax |  | 24,200,000 |
Net Income (Loss) Attributable to Parent, Total |  | $ 1,300,000 |
Resource Plus, Inc [Member] | BDA [Member] |  |  |
Limited Liability Company (LLC) or Limited Partnership (LP), Managing Member or General Partner, Ownership Interest | 70.00% |  |
Resource Plus, Inc [Member] |  |  |
Business Acquisition, Percentage of Voting Interests Acquired | 51.00% |  |
Business Combination, Consideration Transferred, Total | $ 2,756,000 |  |
Business Combination, Consideration Transferred, Liabilities Incurred | 2,300,000 |  |
Resource Plus, Inc [Member] | Mr. Paulk [Member] |  |  |
Business Combination, Consideration Transferred, Total | 3,000,000 |  |
Payments to Acquire Businesses, Net of Cash Acquired, Total | 400,000 |  |
Business Combination, Consideration Transferred, Liabilities Incurred | 2,600,000 |  |
Debt Instrument, Periodic Payment, Principal | $ 300,000 |  |
Debt Instrument, Interest Rate, Stated Percentage | 1.85% |  |
Resource Plus, Inc [Member] | Mr. Justus [Member] |  |  |
Business Combination, Consideration Transferred, Total | $ 150,000 |  |
Payments to Acquire Businesses, Net of Cash Acquired, Total | 50,000 |  |
Business Combination, Consideration Transferred, Liabilities Incurred | 100,000 |  |
Debt Instrument, Periodic Payment, Principal | $ 33,333 |  |
Debt Instrument, Interest Rate, Stated Percentage | 1.85% |  |
Long-term Debt, Maturities, Repayments of Principal in Year Two | $ 33,334 |  |
Employment Agreement, Base Salary | $ 200,000 |  |
Mobex [Member] |  |  |
Business Acquisition, Percentage of Voting Interests Acquired | 51.00% |  |

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- Definition Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04.(a)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24072-122690 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 + Details
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