Quarterly report pursuant to Section 13 or 15(d)

Nature of Business (Details)

Nature of Business (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
Nature of Business (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Net Loss	$ 17,196	$ 19,455	$ 34,422	$ 35,916	$ 75,400	$ 62,300	$ 54,000
Accumulated deficit	(327,405)		(327,405)		(292,983)
Cash and cash equivalents	$ 108,674	$ 101,740	$ 108,674	$ 101,740	$ 41,441	$ 49,886

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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+ Details