Note 14 - Concentrations of Credit Risk (Details Textual)	3 Months Ended	9 Months Ended
Sep. 30, 2019 USD ($)	Sep. 30, 2018	Sep. 30, 2019 USD ($)	Sep. 30, 2018
Cash, Uninsured Amount	$ 928,000		$ 928,000
Distributors and Marketing Partners [Member]
Number of Customers	1	1
Distributors and Marketing Partners [Member] \| Customer Concentration Risk [Member] \| Revenue Benchmark [Member]
Concentration Risk, Percentage	51.00%	58.00%	52.00%	58.00%
Distributors and Marketing Partners [Member] \| Customer Concentration Risk [Member] \| Accounts Receivable [Member]
Concentration Risk, Percentage			49.00%	51.00%

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
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