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Restricted Cash (Tables)
6 Months Ended
Jun. 30, 2019
Restricted Cash [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)

 

 

2019

 

 

 

2018

 

Cash and cash equivalents

 

$

352

 

 

$

2,516

 

Letters of credit

 

 

1,012

 

 

 

1,012

 

Security for credit cards

 

 

50

 

 

 

50

 

Total cash, cash equivalents and restricted cash shown in the statements of cash flows

 

$

1,414

 

 

$

3,578