Financing Arrangements and Fair Value of Financial Instruments - Narrative (Details)	1 Months Ended		3 Months Ended		6 Months Ended
	Jun. 30, 2020 USD ($) $ / shares	Mar. 31, 2019 USD ($)	Jun. 30, 2020 USD ($) $ / shares	Jun. 30, 2019 USD ($)	Jun. 30, 2020 USD ($) trading_day $ / shares	Jun. 30, 2019 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2016 USD ($)
Debt Instrument [Line Items]
Principal amount outstanding	$ 142,085,000		$ 142,085,000		$ 142,085,000		$ 172,164,000
Long-term debt, excluding current maturities	125,291,000		125,291,000		125,291,000		153,538,000
Unamortized debt discount and debt issuance costs	6,275,000		6,275,000		6,275,000		12,291,000
Net gain			(1,334,000)	$ 0	(419,000)	$ 0
Current debt	10,519,000		10,519,000		10,519,000		6,335,000
Foreign operations
Debt Instrument [Line Items]
Current debt	6,900,000		6,900,000		6,900,000		4,800,000
Convertible debt, debt component
Debt Instrument [Line Items]
Long-term debt, excluding current maturities	60,600,000		60,600,000		60,600,000
Unamortized debt discount and debt issuance costs	$ 6,300,000		$ 6,300,000		$ 6,300,000
Senior notes
Debt Instrument [Line Items]
Debt instrument, convertible, threshold trading days | trading_day					20
Debt instrument, convertible, threshold consecutive trading days | trading_day					30
Conversion price percentage					130.00%
Business day period					5 days
Consecutive trading day period					5 days
Debt conversion rate					0.1071381
Percent threshold last reported sale price					98.00%
Interest rate, effective percentage	11.30%		11.30%		11.30%
Convertible Notes
Debt Instrument [Line Items]
Repurchased face amount	$ 33,100,000		$ 33,100,000		$ 33,100,000		0
Repurchase amount	29,100,000		29,100,000		29,100,000
Net gain					(400,000)
Convertible Notes | Revolving credit facility
Debt Instrument [Line Items]
Fixed charge coverage ratio, amount		$ 25,000,000.0
Convertible Notes | Senior notes
Debt Instrument [Line Items]
Debt instrument, face amount								$ 100,000,000.0
Principal amount outstanding	$ 66,912,000		$ 66,912,000		$ 66,912,000		100,000,000
Interest rate, stated percentage								4.00%
Debt instrument, convertible, conversion price (in dollars per share) | $ / shares	$ 9.33		$ 9.33		$ 9.33
Unamortized debt discount and debt issuance costs	$ 6,275,000		$ 6,275,000		$ 6,275,000		12,291,000
Convertible debt, fair value	$ 59,200,000		59,200,000		$ 59,200,000		101,400,000
ABL Facility | Federal Funds Rate
Debt Instrument [Line Items]
Base rate basis spread on variable rate		0.50%
ABL Facility | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Base rate basis spread on variable rate		1.00%
Basis spread on variable rate					1.50%
ABL Facility | London Interbank Offered Rate (LIBOR) | Minimum
Debt Instrument [Line Items]
Basis spread on variable rate	1.50%
ABL Facility | London Interbank Offered Rate (LIBOR) | Maximum
Debt Instrument [Line Items]
Basis spread on variable rate	2.00%
ABL Facility | Base Rate
Debt Instrument [Line Items]
Basis spread on variable rate					0.50%
ABL Facility | Base Rate | Minimum
Debt Instrument [Line Items]
Basis spread on variable rate	0.50%
ABL Facility | Base Rate | Maximum
Debt Instrument [Line Items]
Basis spread on variable rate	1.00%
ABL Facility | Revolving credit facility
Debt Instrument [Line Items]
Principal amount outstanding	$ 64,000,000		64,000,000		$ 64,000,000		$ 65,000,000
Maximum borrowing capacity	132,900,000	$ 200,000,000.0	132,900,000		132,900,000
Maximum borrowing capacity, maximum		275,000,000.0
Drawn	64,000,000.0		64,000,000.0		64,000,000.0
Remaining borrowing capacity	$ 68,900,000		$ 68,900,000		$ 68,900,000
Fixed charge coverage ratio, amount		22,500,000
Debt, weighted average interest rate	1.70%		1.70%		1.70%
Unused capacity, commitment fee percentage					0.375%
Covenant terms acceleration of other indebtedness		$ 25,000,000.0
ABL Facility | Revolving credit facility | Minimum
Debt Instrument [Line Items]
Unused capacity, commitment fee percentage					0.25%
ABL Facility | Revolving credit facility | Maximum
Debt Instrument [Line Items]
Unused capacity, commitment fee percentage					0.375%
Credit Agreement | Domestic Line of Credit
Debt Instrument [Line Items]
Letters of credit outstanding, amount	$ 52,100,000		$ 52,100,000		$ 52,100,000
Restricted cash and cash equivalents, current	$ 7,400,000		$ 7,400,000		$ 7,400,000