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Lease Obligations (Schedule of Lease Information) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Lease Obligations [Abstract]
Operating lease cost	$ 917	$ 850	$ 2,801	$ 2,559
Variable lease cost-operating leases	236	201	726	599
Operating lease right-of-use assets	13,245		13,245		$ 14,988
Current liabilities	3,375		3,375		3,348
Operating lease liabilities (noncurrent portion)	11,315		11,315		13,298
Deferred Expenses	(1,157)	$ (1,422)	(1,157)	$ (1,422)	(1,422)
Total Operating Lease Liabilities	$ 13,533		$ 13,533		$ 15,224

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- Definition

Amount of lessee's undiscounted obligation for lease payments in excess of discounted obligation for lease payments for operating lease.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
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-URI http://asc.fasb.org/extlink&oid=121609121&loc=SL77918701-209980

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Amount of single lease cost, calculated by allocation of remaining cost of lease over remaining lease term. Includes, but is not limited to, single lease cost, after impairment of right-of-use asset, calculated by amortization of remaining right-of-use asset and accretion of lease liability.

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

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Present value of lessee's discounted obligation for lease payments from operating lease, classified as current.

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Present value of lessee's discounted obligation for lease payments from operating lease, classified as noncurrent.

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

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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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