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Amount of amortization expense attributable to debt discount (premium) and debt issuance costs.

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Notes payable (Details) $ in Thousands				1 Months Ended	3 Months Ended		6 Months Ended
Notes payable (Details) $ in Thousands	Mar. 02, 2020 USD ($)	Apr. 15, 2019 installment	Apr. 14, 2014	Aug. 31, 2018 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)	Oct. 31, 2018 USD ($)
Long Term Debt
End Of Term Fee							$ 50,000
Loan principal payment installment \| installment		5
Maximum
Long Term Debt
Non-cash interest expense					$ 100	$ 100	100	$ 100
Loan agreement
Long Term Debt
Additional amounts available to borrow					$ 0		$ 0
Loan agreement \| Minimum
Long Term Debt
Interest rate (as a percent)			8.00%
Amendment 5 to loan agreement
Long Term Debt
Term fee	$ 100			$ 100
Cost incurred upon execution				$ 50
Amendment 6 to loan agreement
Long Term Debt
Certificate of deposit associated with the lease									$ 1,000
Prime rate \| Loan agreement
Long Term Debt
Margin on variable interest rate (as a percent)			(5.25%)