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Consolidated Balance Sheets (Parenthetical) - USD ($) | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Statement of Financial Position [Abstract] |  |
Restricted cash | $ 163,813 | $ 145,385
Allowance for doubtful accounts receivable | 46,624 | 79,802
Due from related parties | 61,623 | 95,794
Due to related parties, deferred revenue | 0 | 184,000
Investments in related party | 53,363 | 53,371
Due from related parties, deferred revenue | $ 140,000 | $ 920,000
Preferred stock, par value | $ 0.0001 | $ 0.0001
Preferred stock, shares authorized | 100,000,000 | 100,000,000
Preferred stock, shares issued |  |
Preferred stock, shares outstanding |  |
Common stock, par value | $ 0.0001 | $ 0.0001
Common stock, shares authorized | 500,000,000 | 500,000,000
Common stock, shares issued | 54,723,889 | 54,715,287
Common stock, shares outstanding | 54,723,889 | 54,715,287

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