Long-Term Debt and Credit Facility (Credit Facility) (Details) - Restated Revolving Credit, Term Loan and Security Agreement			12 Months Ended
	Jun. 13, 2018 USD ($)	May 10, 2013 USD ($)	Dec. 31, 2018 USD ($)
Debt Instrument [Line Items]
Annual limit on capital expenditures			$ 26,000,000
Percent of adjusted EBITDA which must be paid		25.00%
Credit facility ceiling value, applicable to 25% of adjusted EBITDA which must be paid		$ 3,000,000.0
Covenant, maximum number of days from year end by which prepayment of 25% of adjusted EBITDA is due		75 days
Line of Credit
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 75,000,000	$ 75,000,000
Capacity available for inventory	52,000,000
Undrawn availability threshold to reduce annual capital expenditures limit	15,000,000
Credit facility, remaining borrowing capacity			25,100,000
Line of Credit | Revolving Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity		$ 75,000,000
Possible reduction in maximum borrowing capacity	$ 10,000,000
Undrawn availability threshold to reduce annual capital expenditures limit			$ 15,000,000
Credit facility, financial covenant, fixed charge coverage ratio			1.10
Credit facility, remaining borrowing capacity			$ 16,800,000
Credit facility, financial covenant, funded debt to adjusted EBITDA ratio			3.00