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Note 3 - Revenue From Contracts With Customers - Disaggregation of Revenue (Details) - USD ($) | 3 Months Ended
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Mar. 31, 2020 | Mar. 31, 2019
Revenue from Contract with Customer, Including Assessed Tax |  | $ 522,485 | $ 551,623
North America [Member] |  |  |
Revenue from Contract with Customer, Including Assessed Tax |  | 417,905 | 256,265
South America [Member] |  |  |
Revenue from Contract with Customer, Including Assessed Tax |  | 375 | 2,516
EMEA [Member] |  |  |
Revenue from Contract with Customer, Including Assessed Tax | [1] | 3,767 | 69,336
Asia [Member] |  |  |
Revenue from Contract with Customer, Including Assessed Tax |  | 100,438 | 223,506
License [Member] |  |  |
Revenue from Contract with Customer, Including Assessed Tax |  | 235,345 | 83,208
License [Member] | North America [Member] |  |  |
Revenue from Contract with Customer, Including Assessed Tax |  | 165,235 | 14,208
License [Member] | South America [Member] |  |  |
Revenue from Contract with Customer, Including Assessed Tax |  |  |
License [Member] | EMEA [Member] |  |  |
Revenue from Contract with Customer, Including Assessed Tax | [1] |  |
License [Member] | Asia [Member] |  |  |
Revenue from Contract with Customer, Including Assessed Tax |  | 70,110 | 69,000
Hardware [Member] |  |  |
Revenue from Contract with Customer, Including Assessed Tax |  | 79,617 | 226,805
Hardware [Member] | North America [Member] |  |  |
Revenue from Contract with Customer, Including Assessed Tax |  | 56,354 | 45,981
Hardware [Member] | South America [Member] |  |  |
Revenue from Contract with Customer, Including Assessed Tax |  |  | 400
Hardware [Member] | EMEA [Member] |  |  |
Revenue from Contract with Customer, Including Assessed Tax | [1] |  | 32,918
Hardware [Member] | Asia [Member] |  |  |
Revenue from Contract with Customer, Including Assessed Tax |  | 23,263 | 147,506
Maintenance [Member] |  |  |
Revenue from Contract with Customer, Including Assessed Tax |  | 207,523 | 241,610
Maintenance [Member] | North America [Member] |  |  |
Revenue from Contract with Customer, Including Assessed Tax |  | 196,316 | 196,076
Maintenance [Member] | South America [Member] |  |  |
Revenue from Contract with Customer, Including Assessed Tax |  | 375 | 2,116
Maintenance [Member] | EMEA [Member] |  |  |
Revenue from Contract with Customer, Including Assessed Tax |  | 3,767 | 36,418
Maintenance [Member] | Asia [Member] |  |  |
Revenue from Contract with Customer, Including Assessed Tax |  | $ 7,065 | $ 7,000
[1] | EMEA - Europe, Middle East, Africa

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- Definition Amount, including tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value-added and excise. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 41 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9038-108599 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130545-203045 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8906-108599 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130543-203045 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 42 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9054-108599 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 40 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9031-108599 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 924 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 11.L) -URI http://asc.fasb.org/extlink&oid=6472922&loc=d3e499488-122856 + Details
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