Quarterly report pursuant to Section 13 or 15(d)

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

v3.8.0.1
Summary of Significant Accounting Policies - Components of Inventory (Details) - USD ($)
$ in Thousands
Mar. 31, 2018
Dec. 31, 2017
Accounting Policies [Abstract]    
Raw materials $ 1,446 $ 1,269
Work in process 258 245
Finished goods 306 17
Total inventory