Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Segments (Details)

v3.8.0.1
Summary of Significant Accounting Policies - Segments (Details)
$ in Thousands
3 Months Ended 9 Months Ended 12 Months Ended
Jul. 15, 2016
segment
Dec. 31, 2017
USD ($)
item
Sep. 30, 2017
USD ($)
Jun. 30, 2017
USD ($)
Mar. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
item
Sep. 30, 2016
USD ($)
Jun. 30, 2016
USD ($)
Mar. 31, 2016
USD ($)
Sep. 30, 2016
segment
Dec. 31, 2017
USD ($)
segment
item
Dec. 31, 2016
USD ($)
item
Dec. 31, 2015
USD ($)
item
Product offerings                          
Number of distributors with more than 10% of company's net sales | item   0       0         0 0 0
Segment Reporting                          
Number of operating segments 2                 1 2    
Number of Reportable Segments                   1 2    
Net sales | $   $ 137,969 $ 125,339 $ 139,371 $ 72,248 $ 130,143 $ 123,573 $ 113,763 $ 48,789   $ 474,927 $ 416,268 $ 400,408