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Condensed Consolidated Balance Sheets (Parenthetical) - USD ($)	Jun. 30, 2018	Dec. 31, 2017	Dec. 31, 2016
Statement of Financial Position [Abstract]
Allowances and reserves on accounts receivable	$ 39,686	$ 42,006
Common stock, par value	$ 0.001	$ 0.001	$ 0.001
Common stock, shares authorized	25,000,000	25,000,000	25,000,000
Common stock, shares issued	6,882,316	6,881,794	6,714,915
Common stock, shares outstanding	6,882,316	6,881,794	6,714,915

X

- Definition

A valuation allowance for trade and other receivables due to an Entity within one year (or the normal operating cycle, whichever is longer) that are expected to be uncollectible.

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

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