Balance Sheet Components - Goodwill (Details)	12 Months Ended
Dec. 31, 2018 USD ($)
Goodwill
Beginning balance	$ 5,210,821
Impairment	$ (5,210,821)

Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration