Pledge of Cash and Restricted Cash (Tables)

12 Months Ended

Dec. 31, 2019

Pledge of Cash and Restricted Cash [Abstract]

Reconciliation of Cash, Cash Equivalents, and Restricted Cash

	December 31,
	2019		2018
Cash and cash equivalents	$	25,993	$	9,877
Restricted cash		52		51
Total cash, cash equivalents, and restricted cash shown in the statements of cash flows	$	26,045	$	9,928