Note 16 - Supplemental Cash Flow Information - Reconciliation of Cash and Cash Equivalents and Restricted Cash Reported Within the Statement of Financial Position (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2019	Dec. 31, 2018
Cash and cash equivalents	$ 33,818	$ 26,662	$ 22,845
Restricted cash	1,620		1,632
Total cash, cash equivalents and restricted cash	$ 35,438	$ 28,293	$ 24,477	$ 14,985