Accrued Liabilities
 6 Months Ended
Jun. 30, 2019
Accounts Payable and Accrued Liabilities [Abstract]  
Accrued Liabilities

6. Accrued Liabilities

 

Accrued liabilities consist of the following:

 

    June 30,     December 31,  
(in thousands)   2019     2018  
Accrued Expenses   $ 711     $ 924  
Received not billed     870       240  
Accrued Compensation     380       476  
Other     59       69  
Accrued Project Costs     85       102  
Total   $ 2,105     $ 1,811