Borrowings - EBITDA Targets (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2018 USD ($)
Period One
Debt Instrument [Line Items]
Debt Covenant, Minimum Net Sales	$ 52,000
Debt Covenant, Trailing 12-Month Consolidated EBITDA	(5,000)
Period Two
Debt Instrument [Line Items]
Debt Covenant, Minimum Net Sales	53,500
Debt Covenant, Trailing 12-Month Consolidated EBITDA	(3,500)
Period Three
Debt Instrument [Line Items]
Debt Covenant, Minimum Net Sales	54,500
Debt Covenant, Trailing 12-Month Consolidated EBITDA	(2,000)
Period Four
Debt Instrument [Line Items]
Debt Covenant, Minimum Net Sales	56,000
Debt Covenant, Trailing 12-Month Consolidated EBITDA	0
Period Five
Debt Instrument [Line Items]
Debt Covenant, Minimum Net Sales	57,500
Debt Covenant, Trailing 12-Month Consolidated EBITDA	1,000
Period Six
Debt Instrument [Line Items]
Debt Covenant, Minimum Net Sales	58,500
Debt Covenant, Trailing 12-Month Consolidated EBITDA	2,000
Period Seven
Debt Instrument [Line Items]
Debt Covenant, Minimum Net Sales	60,000
Debt Covenant, Trailing 12-Month Consolidated EBITDA	$ 3,000