Cash, Cash Equivalents and Restricted Cash (Tables)

6 Months Ended

Jun. 30, 2020

Cash And Cash Equivalents [Abstract]

Schedule of Cash, Cash Equivalents, and Restricted Cash

Cash, cash equivalents, and restricted cash balances were as follows:

	June 30,		December 31,
(in thousands)		2020		2019
Cash and cash equivalents	$	16,011	$	10,002
Letters of credit		131		131
Security for credit cards		50		50
Total cash, cash equivalents and restricted cash shown in    the statements of cash flows	$	16,192	$	10,183