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Note 13 - Purchase of Interests in Subsidiaries (Details Textual) - USD ($) |  | 12 Months Ended
--- | --- | ---
Jan. 09, 2018 | Dec. 31, 2019 | Dec. 31, 2018
Payments to Acquire Businesses, Net of Cash Acquired, Total |  |  | $ (767,000)
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 |  |
Mobex [Member] |  |  |
Business Acquisition, Percentage of Voting Interests Acquired | 51.00% |  |

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- Definition Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=116859721&loc=d3e6613-128477 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120321790&loc=d3e6927-128479 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=116859721&loc=d3e6578-128477 + Details
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