Note 12 - Leases - Payments Under Non-cancelable Operating Leases and Capital Leases (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Capital leases, 2019	$ 258
Operating leases, 2019	882
Capital leases, 2020	241
Operating leases, 2020	672
Capital leases, 2021	214
Operating leases, 2021	564
Capital leases, 2022	168
Operating leases, 2022	273
Capital leases, 2023	85
Operating leases, 2023	262
Capital leases, Total minimum lease payments	966
Less: Amount representing interest	86
Present value of minimum lease payments	880
Less: Current maturities	204	$ 71
Capital lease obligations, net of current portion	$ 676