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Lease Obligations (Schedule of Lease Information) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Lease Obligations [Abstract]
Operating lease cost	$ 854	$ 812	$ 1,709	$ 1,562
Variable lease cost-operating leases	196	170	398	302
Operating lease right-of-use assets	13,335	13,246	13,335	13,246	$ 13,246
Current liabilities	2,731	2,590	2,731	2,590
Operating lease liabilities (noncurrent portion)	10,790	10,790	10,790	10,790
Total operating lease liabilities	$ 13,521	$ 13,380	$ 13,521	$ 13,380	$ 13,380

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- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 55
-Paragraph 53
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- Definition

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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