Balance Sheet Account Details - Schedule of Accounts Receivable (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, trade	$ 5,749		$ 6,889
Less allowance for doubtful accounts	(1,889)		(555)
Accounts receivable, net	3,860		$ 6,334
Provision for bad debt expense	1,334	$ 0
Diagnostic Services
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, trade	$ 635