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Consolidated Balance Sheets (Parenthetical) - $ / shares	Sep. 30, 2021	Dec. 31, 2020
Stockholders' equity
Preferred stock par value	$ 0.001	$ 0.001
Preferred stock shares authorized	1,000,000	1,000,000
Preferred stock shares issued	0	0
Common stock par value	$ 0.001	$ 0.001
Common stock shares authorized	30,000,000	30,000,000
Common stock shares issued	13,726,884	13,628,675
Common stock shares outstanding	13,726,884	13,628,675
Treasury stock shares	33,092	33,092

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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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