Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies - Components of Inventory (Details)

v3.19.2
Summary of Significant Accounting Policies - Components of Inventory (Details) - USD ($)
$ in Thousands
Jun. 30, 2019
Dec. 31, 2018
Accounting Policies [Abstract]    
Raw materials $ 960 $ 1,374
Work in process 452 371
Finished goods 614 158
Total inventory $ 2,026 $ 1,903