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Note 4 - Basic and Diluted Loss Per Common Share	6 Months Ended
	Jun. 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 376,130 and 351,684 shares for the three -month and six -month periods ended June 30, 2019, respectively, as compared to 51,270 and 51,155 shares for the three -month and six -month periods ended June 30, 2018, respectively.

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- Definition

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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