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Leases - Supplemental Balance Sheet Information (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Leases
Operating lease right-of-use assets	$ 1,645	$ 1,936
Operating lease liabilities:
Current portion of operating lease liabilities, included in accrued liabilities	554	579
Operating lease liabilities, net of current portion	1,214	1,489
Total operating lease liabilities	$ 1,768	$ 2,068
Weighted average remaining lease term for operating leases (in years)	3 years 1 month 13 days	3 years 6 months 14 days
Weighted average discount rate for operating leases	6.10%	6.10%

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Present value of lessee's discounted obligation for lease payments from operating lease.

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Amount of lessee's right to use underlying asset under operating lease.

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Weighted average discount rate for operating lease calculated at point in time.

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Weighted average remaining lease term for operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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