Note 5 - Cash, Cash Equivalents and Restricted Cash - Summary of Cash, Cash Equivalents and Restricted Cash (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019	Sep. 30, 2019	Dec. 31, 2018
Cash and cash equivalents	$ 46,772	$ 59,977
Restricted cash	11,296	7,051
Total cash, cash equivalents and restricted cash shown in the statement of cash flows	$ 58,068	$ 67,028	$ 72,376	$ 58,004