CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Cash and cash equivalents	$ 33,065	$ 33,551	$ 52,056
Total cash, cash equivalents, and restricted cash shown in consolidated statements of cash flows	33,118	33,854	52,419	$ 53,433
Prepaid expenses and other current assets
Restricted cash	53	0	60
Other long-term assets
Restricted cash	$ 0	$ 303	$ 303