Unaudited Consolidated Balance Sheets (Parentheticals) - $ / shares	Jun. 30, 2019	Dec. 31, 2018
Preferred stock - par value	$ 0.0001	$ 0.0001
Preferred stock shares authorized	10,000,000	10,000,000
Common stock - par value	$ 0.0001	$ 0.0001
Common stock shares authorized	250,000,000	250,000,000
Common stock shares issued	13,728,371	13,280,927
Common stock shares outstanding	13,728,371	13,280,927
Series C Convertible Preferred Stock
Preferred stock shares issued	0	1,000
Preferred stock shares outstanding	0	1,000

Face amount or stated value per share of common stock.

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Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

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Aggregate share number for all nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) held by stockholders. Does not include preferred shares that have been repurchased.

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