Related Party Transactions - Remy W. Trafelet, Henry R. Slack and George R. Brokaw (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Mar. 31, 2018
Related Party Transaction [Line Items]
Period equivalent to severance cost payment	18 months
Period of post-termination noncompetition and customer and employee nonsolicitation covenants	12 months
Remy W. Trafelet
Related Party Transaction [Line Items]
Annual base salary		$ 400
Payment to executives in cash		400
Options granted in period (in shares)	300,000
Period equivalent to severance cost payment	24 months
Henry R. Slack
Related Party Transaction [Line Items]
Annual base salary		250
Payment to executives in cash		250
Options granted in period (in shares)	225,000
George R. Brokaw
Related Party Transaction [Line Items]
Annual base salary		250
Payment to executives in cash		$ 250
Options granted in period (in shares)	225,000
Period equivalent to severance cost payment	18 months