Long-Term Debt (Details Textual) - USD ($)			3 Months Ended		12 Months Ended
	Feb. 28, 2019	Sep. 01, 2018	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Jun. 30, 2018	Jul. 21, 2017
Line of Credit Facility [Line Items]
Debt borrowings			$ 52,218,000	$ 557,000
Long-term Debt			159,668,000			$ 168,767,000
Revolving Credit Facility, Capacity Available for Letter of Credit			30,000,000
Loss on debt restructuring			2,270,000	$ 0
Insurance Premium Financing Agreement							$ 17,800,000
Insurance Premium Financing Agreement, Periodic Payment		$ 2,000,000
Insurance Premium Financing Agreement, Interest Rate							4.75%
Insurance Premium Payable			$ 4,000,000			$ 10,000,000
ABL Facility [Member] | Minimum | London Interbank Offered Rate (LIBOR) [Member]
Line of Credit Facility [Line Items]
Debt instrument variable rate margin (as a percentage)			1.50%
ABL Facility [Member] | Minimum | Base Rate
Line of Credit Facility [Line Items]
Debt instrument variable rate margin (as a percentage)			0.50%
ABL Facility [Member] | Maximum | London Interbank Offered Rate (LIBOR) [Member]
Line of Credit Facility [Line Items]
Debt instrument variable rate margin (as a percentage)			2.25%
ABL Facility [Member] | Maximum | Base Rate
Line of Credit Facility [Line Items]
Debt instrument variable rate margin (as a percentage)					1.25%
ABL Facility [Member] | Revolving credit facility
Line of Credit Facility [Line Items]
Debt borrowings	$ 141,400,000
Line of Credit Facility, Maximum Borrowing Capacity	200,000,000							$ 200,000,000
Line of Credit Facility, Increase (Decrease), Net	$ 100,000,000.0
Total availability under revolving credit facility			$ 64,500,000
ABL Facility [Member] | Revolving credit facility | Minimum | London Interbank Offered Rate (LIBOR) [Member]
Line of Credit Facility [Line Items]
Debt instrument variable rate margin (as a percentage)	1.50%
ABL Facility [Member] | Revolving credit facility | Minimum | Base Rate
Line of Credit Facility [Line Items]
Debt instrument variable rate margin (as a percentage)	0.50%
ABL Facility [Member] | Revolving credit facility | Maximum | London Interbank Offered Rate (LIBOR) [Member]
Line of Credit Facility [Line Items]
Debt instrument variable rate margin (as a percentage)	2.00%
ABL Facility [Member] | Revolving credit facility | Maximum | Base Rate
Line of Credit Facility [Line Items]
Debt instrument variable rate margin (as a percentage)	1.00%
Average annualized interest rate (as a percentage)			5.10%
ABL Facility [Member] | Revolving credit facility | FILO Loans [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Capacity Available for Specific Purpose Other than for Trade Purchases	$ 15,000,000
ABL Facility [Member] | Revolving credit facility | Non-FILO Loans [Member] | Minimum | London Interbank Offered Rate (LIBOR) [Member]
Line of Credit Facility [Line Items]
Debt instrument variable rate margin (as a percentage)	2.50%
ABL Facility [Member] | Revolving credit facility | Non-FILO Loans [Member] | Minimum | Base Rate
Line of Credit Facility [Line Items]
Debt instrument variable rate margin (as a percentage)	1.50%
ABL Facility [Member] | Revolving credit facility | Non-FILO Loans [Member] | Maximum | London Interbank Offered Rate (LIBOR) [Member]
Line of Credit Facility [Line Items]
Debt instrument variable rate margin (as a percentage)	3.00%
ABL Facility [Member] | Revolving credit facility | Non-FILO Loans [Member] | Maximum | Base Rate
Line of Credit Facility [Line Items]
Debt instrument variable rate margin (as a percentage)	2.00%
ABL Facility [Member] | Bridge Loan [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 20,000,000							20,000,000
ABL Facility [Member] | Letter of Credit [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	30,000,000							30,000,000
ABL Facility [Member] | Term Loan Facility [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity								56,800,000
ABL Facility [Member] | Asset-Based Facility [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity								$ 35,000,000
Term Loan Credit Facility [Member] | Line of Credit [Member]
Line of Credit Facility [Line Items]
Debt borrowings	$ 51,100,000
Long-term Debt			$ 61,100,000
Average annualized interest rate (as a percentage)			10.00%
Term Loan Credit Facility [Member] | Line of Credit [Member] | Tranche A Term Loans [Member]
Line of Credit Facility [Line Items]
Long-term Debt			$ 40,300,000
Term Loan Credit Facility [Member] | Line of Credit [Member] | Tranche A Term Loans [Member] | London Interbank Offered Rate (LIBOR) [Member]
Line of Credit Facility [Line Items]
Debt instrument variable rate margin (as a percentage)			7.50%
Term Loan Credit Facility [Member] | Line of Credit [Member] | Tranche A FILO Term Loans [Member]
Line of Credit Facility [Line Items]
Long-term Debt			$ 2,500,000
Term Loan Credit Facility [Member] | Line of Credit [Member] | Tranche A FILO Term Loans [Member] | London Interbank Offered Rate (LIBOR) [Member]
Line of Credit Facility [Line Items]
Debt instrument variable rate margin (as a percentage)			8.50%
Term Loan Credit Facility [Member] | Line of Credit [Member] | Tranche A FILO Term Loans [Member] | Base Rate
Line of Credit Facility [Line Items]
Debt instrument variable rate margin (as a percentage)			7.50%
Term Loan Credit Facility [Member] | Line of Credit [Member] | Tranche B Term Loans [Member]
Line of Credit Facility [Line Items]
Long-term Debt			$ 8,300,000
Term Loan Credit Facility [Member] | Line of Credit [Member] | Asset-Based Facility [Member]
Line of Credit Facility [Line Items]
Long-term Debt			$ 10,000,000
Term Loan Credit Facility [Member] | Line of Credit [Member] | Tranche A Term Loans, Tranche B Term Loans, and Capital Expenditure Loans [Member] | Base Rate
Line of Credit Facility [Line Items]
Debt instrument variable rate margin (as a percentage)			6.50%