Description of Business and Summary of Significant Accounting Policies (Details 3) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Description of Business and Summary of Significant Accounting Policies [Abstract]
Cash and cash equivalents	$ 31,242	$ 41,601
Restricted cash-short-term included in other current assets	6,792	1,653
Restricted cash-long-term	520	943
Total cash, cash equivalents, and restricted cash	$ 38,554	$ 44,197	$ 31,927