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Cost of revenue (Tables)

3 Months Ended

Mar. 31, 2020

Other Income And Expenses [Abstract]

Schedule of Cost of Revenue

Cost of revenue consists of the following:

		Three months ended March 31,
		2019				2020
Personnel expenses		$	380,178			$	462,115
Operational expenses			119,792				117,197
Depreciation and amortization			19,167				25,459
		$	519,137			$	604,771

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Tabular disclosure of amounts and nature of costs included in cost of revenue reported during the period.

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