Basis of Presentation and Significant Accounting Policies - Concentration of Credit Risk and Significant Customers (Details) - Customer Concentration Risk			3 Months Ended		6 Months Ended
	Jun. 30, 2020	Dec. 31, 2019	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Customer A | REVENUES
Concentration Risk [Line Items]
Concentration risk, percentage			0.00%	6.00%	0.00%	22.00%
Customer A | ACCOUNTS RECEIVABLE
Concentration Risk [Line Items]
Concentration risk, percentage	75.00%	73.00%
Customer B | REVENUES
Concentration Risk [Line Items]
Concentration risk, percentage			17.00%	26.00%	19.00%	23.00%
Customer B | ACCOUNTS RECEIVABLE
Concentration Risk [Line Items]
Concentration risk, percentage	7.00%	2.00%
Customer C | REVENUES
Concentration Risk [Line Items]
Concentration risk, percentage			11.00%	13.00%	9.00%	6.00%
Customer C | ACCOUNTS RECEIVABLE
Concentration Risk [Line Items]
Concentration risk, percentage	0.00%	2.00%
Customer D | REVENUES
Concentration Risk [Line Items]
Concentration risk, percentage			6.00%	4.00%	11.00%	4.00%
Customer D | ACCOUNTS RECEIVABLE
Concentration Risk [Line Items]
Concentration risk, percentage	3.00%	3.00%
Customer E | REVENUES
Concentration Risk [Line Items]
Concentration risk, percentage			0.00%	5.00%	0.00%	10.00%
Customer E | ACCOUNTS RECEIVABLE
Concentration Risk [Line Items]
Concentration risk, percentage	0.00%	0.00%