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Leases Total Lease Cost (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Leases [Abstract]
Operating lease cost	$ 374	$ 372	$ 749	$ 745
Short-term lease cost	49	48	88	122
Variable lease cost	111	126	239	253
Sublease income	(43)	(28)	(82)	(56)
Total lease cost, net	$ 491	$ 518	$ 994	$ 1,064

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Amount of operating lease expense. Excludes sublease income.

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Amount of operating lease income from lease payments and variable lease payments paid and payable to lessor. Includes, but is not limited to, variable lease payments not included in measurement of lease receivable.

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Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income.

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Amount of short-term lease cost, excluding expense for lease with term of one month or less.

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Amount of variable lease cost, excluded from lease liability, recognized when obligation for payment is incurred for finance and operating leases.

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