Restricted Cash

12 Months Ended

Dec. 31, 2018

Restricted Cash [Abstract]

Restricted Cash

(4) Restricted Cash

Cash and cash equivalents that are restricted as to withdrawal or use under the terms of certain contractual agreements are recorded in Restricted Cash on the balance sheet. Restricted cash does not include required minimum balances.

(in thousands)	December 31, 2018		December 31, 2017
Cash and cash equivalents	$	2,516	$	3,999
Convertible Notes		—		238
Letters of credit		1,012		1,012
Security for credit cards		50		75
Total cash, cash equivalents and restricted cash shown    in the statement of cash flows	$	3,578	$	5,324