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Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($)	Jun. 30, 2019	Dec. 31, 2018
Statement of Financial Position [Abstract]
Trade accounts receivable, less allowance for doubtful accounts	$ 17,837,014	$ 17,815,075
Other receivables, less allowance for doubtful accounts	$ 40,555	$ 34,884
Preferred stock, par value	$ 0.001	$ 0.001
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, shares issued
Preferred stock, shares outstanding
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	95,000,000	95,000,000
Common stock, shares issued	43,579,557	43,579,557
Common stock, shares outstanding	43,579,557	43,579,557

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

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