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Note 4 - Basic and Diluted Loss Per Common Share	9 Months Ended
	Sep. 30, 2019
Notes to Financial Statements
Earnings Per Share [Text Block]	4. Basic and Diluted Loss Per Common Share Basic net loss per share is computed using the weighted-average number of common shares outstanding during the period. Diluted net loss per share is computed using the weighted-average number of common shares and potentially dilutive common share equivalents outstanding during the period. Potentially dilutive common share equivalents consist of convertible preferred stock, stock options and stock purchase warrants. Common share equivalents which potentially could dilute basic earnings per share in the future, and which were excluded from the computation of diluted loss per share, as the effect would be anti-dilutive, totaled 10,937,156 and 10,895,920 shares for the three -month and nine -month periods ended September 30, 2019, respectively, as compared to 86,783 and 75,740 shares for the three -month and nine -month periods ended September 30, 2018, respectively.

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The entire disclosure for earnings per share.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-URI http://asc.fasb.org/topic&trid=2144383

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