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Condensed Consolidated Balance Sheets (Parenthetical) - USD ($)	Mar. 31, 2020	Dec. 31, 2019
Statement of Financial Position [Abstract]
Allowance for doubtful accounts	$ 1,128,000	$ 859,000
Preferred stock, par value	$ 0.001	$ 0.001
Preferred stock, shares authorized	3,000,000	3,000,000
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	60,000,000	60,000,000
Common stock, shares issued	30,531,949	29,478,338
Common stock, shares outstanding	30,531,949	29,478,338

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Amount of allowance for credit loss on accounts receivable.

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