CONSOLIDATED BALANCE SHEETS 10K (Parenthetical) - $ / shares	Sep. 30, 2021	Feb. 21, 2021	Jan. 26, 2021	Jan. 25, 2021	Dec. 31, 2020	Dec. 30, 2020	Dec. 31, 2019
Statement of Financial Position [Abstract]
Common stock, par value (in dollars per share)	$ 0.0001				$ 0.0001		$ 0.0001
Common stock, authorized (in shares)	93,000,000	93,000,000	90,000,000	100,000,000	100,000,000	75,000,000	75,000,000
Common stock, issued (in shares)	11,798,521				11,066,936	15,553,235	14,859,315
Common stock, outstanding (in shares)	11,798,521				11,066,936		14,859,315

Face amount or stated value per share of common stock.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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-Topic 210
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The maximum number of common shares permitted to be issued by an entity's charter and bylaws.

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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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Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
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