Significant Risks and Uncertainties Including Business and Credit Concentrations (Tables)

9 Months Ended

Sep. 30, 2020

Risks and Uncertainties [Abstract]

Schedule of revenue from major customers

Product sales to third-party customers that accounted for 10% or a greater share of consolidated product sales are as follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2020		2019		2020		2019
Customer A	35	%	49	%	36	%	50 %
Customer B	10	%	12	%	10	%	11	%
Customer C	26	%	22	%	29	%	21	%
Customer D	8	%	8	%	8	%	11	%
Customer E	12	%	—	%	5	%	—	%