Leases (Details) - USD ($) $ in Thousands	1 Months Ended
	May 31, 2020	Jun. 30, 2020	Dec. 31, 2019
Future operating lease payments
2020 (remaining six months)		$ 873
2021		1,603
2022		861
2023		68
Total undiscounted lease payments		3,405
Less: Current portion of operating lease liabilities		(1,546)	$ (1,582)
Total operating lease liabilities, net of current portion		$ 1,656	$ 1,840
Arizona manufacturing facility
Leases
Period of time lease was extended	1 year