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Note 8 - Leases - Lease Obligations (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Amortization of right-of-use assets	$ 1,037	$ 1,411
Interest on lease liabilities	247	227
Operating lease cost	6,602	6,182
Variable lease cost	158
Total lease cost	8,044	7,820
Operating cash flows from finance leases	1,037	1,146
Operating cash flows from operating leases	6,760	6,182
Financing cash flows from finance leases	247	227
Right-of-use assets obtained in exchange for new operating lease liabilities	$ 461	$ 4,146
Weighted-average remaining lease term—finance leases (Year)		2 years 255 days
Weighted-average remaining lease term—operating leases (Year)		3 years 182 days
Weighted-average discount rate—finance leases		3.00%
Weighted-average discount rate—operating leases		5.20%

X

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Amount of interest expense on finance lease liability.

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Amount of amortization expense attributable to right-of-use asset from finance lease.

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

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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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