CONSOLIDATED BALANCE SHEETS (Parentheticals) - USD ($)	Dec. 31, 2020	Dec. 31, 2019
Statement of Financial Position [Abstract]
Accounts receivable, allowance for doubtful accounts (in Dollars)	$ 585,257	$ 589,243
Common stock: par value (in Dollars per share)	$ 0.001	$ 0.001
Common stock: shares authorized	50,000,000	50,000,000
Common stock: shares issued	20,240,882	20,240,882
Common stock: shares outstanding	20,240,882	20,240,882

Amount of allowance for credit loss on accounts receivable, classified as noncurrent.

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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Face amount or stated value per share of common stock.

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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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