Note 7 - Leases - Lease Cost (Details) $ in Thousands	9 Months Ended
Sep. 30, 2019 USD ($)
Lease cost:
Operating	$ 918
Variable	167
Short-term	20
Total lease cost	1,105
Operating, cash paid for amounts included in measurement of lease liabilities	$ 905
Operating, weighted average remaining lease term (Year)	2 years 335 days
Operating, weighted-average discount rate	4.45%

Amount of lease cost recognized by lessee for lease contract.

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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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Amount of cash outflow from operating lease, excluding payments to bring another asset to condition and location necessary for its intended use.

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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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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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