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Net income / (loss) per share (Details) - USD ($)	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Net income / (loss) per share [Abstract]
Net income (loss) per share weighted-average number of common stock outstanding (in shares)	46,105,947
Numerator [Abstract]
Net Income / (loss)	$ 2,905,674	$ (216,616)
Denominator [Abstract]
Weighted average shares outstanding, basic (in shares)	37,769,554	14,979,803
Dilutive effect of common stock issuable from assumed exercise of warrants (in shares)	3,217,792	0
Weighted average shares outstanding, diluted (in shares)	40,987,346	14,979,803
Net income / (loss) per share [Abstract]
Basic (in dollars per share)	$ 0.08	$ (0.01)
Diluted (in dollars per share)	$ 0.07	$ (0.01)

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