Summary of Business and Significant Accounting Principles - Warranty Accrual (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Movement in Standard Product Warranty Accrual [Roll Forward]
Warranty accrual, beginning balance	$ 7,058,769	$ 142,560
Accrual for warranty	92,191	7,981,413
Warranty costs incurred	(1,149,096)	(1,065,204)
Warranty accrual, ending balance	$ 6,001,864	$ 7,058,769