Summary of Significant Accounting Policies - Additional Information (Detail)			1 Months Ended				12 Months Ended
	Nov. 01, 2018 $ / shares	Jul. 26, 2018 USD ($)	Aug. 31, 2019 USD ($)	Aug. 31, 2017 USD ($)	Jun. 30, 2014 USD ($) $ / shares	Jul. 31, 2013 USD ($) $ / shares	Dec. 31, 2019 USD ($) $ / shares shares	Dec. 31, 2018 USD ($) shares	Dec. 31, 2017 USD ($) shares	Aug. 09, 2019 USD ($)	Jan. 01, 2019 USD ($)	Aug. 01, 2018 USD ($)	Nov. 07, 2017	Oct. 31, 2016
Significant Accounting Policies [Line Items]
Contract assets							$ 0
Sales commissions amortization period (less than)							1 year
Reserve for sales returns and allowances							$ 38,400,000	$ 29,400,000
Long term debt, face amount							52,658,000	140,974,000
Inventory Valuation Reserves							12,900,000	12,800,000
Depreciation expense							12,900,000	12,200,000	$ 13,000,000
Loss on disposal of tools							972,000	0	0
Advertising expenses							$ 13,800,000	$ 13,700,000	$ 10,800,000
Stock repurchased (in shares) | shares							3,112,840
Share price (in dollars per share) | $ / shares							$ 7.71
Stock repurchased							$ 24,000,000
Total							35,083,000
Operating lease right-of-use assets, net							$ 32,081,000
Convertible Senior Notes
Significant Accounting Policies [Line Items]
Potentially dilutive securities excluded from computation of diluted earnings per common share (in shares) | shares							29,074,975	21,606,816	18,272,906
Options and warrants
Significant Accounting Policies [Line Items]
Potentially dilutive securities excluded from computation of diluted earnings per common share (in shares) | shares							0	0	1,062,500
Restricted Stock
Significant Accounting Policies [Line Items]
Potentially dilutive securities excluded from computation of diluted earnings per common share (in shares) | shares							1,423,500	1,130,233	312,663
Minimum
Significant Accounting Policies [Line Items]
Discount on invoiced amount of products							1.00%
Maximum
Significant Accounting Policies [Line Items]
Discount on invoiced amount of products							20.00%
Molds and tools
Significant Accounting Policies [Line Items]
Property and equipment useful life							3 years
Impairment charges							$ 0	$ 0	$ 0
After Modification Senior Notes (due 2018) | Oasis Management and Oasis Investments ll Master Fund Ltd.
Significant Accounting Policies [Line Items]
Debt instrument, interest rate													3.25%
4.25% Convertible Senior Notes Due 2018
Significant Accounting Policies [Line Items]
Long term debt, face amount						$ 100,000,000.0
Debt instrument, interest rate		4.25%		4.25%		4.25%	4.25%
Debt conversion ratio						0.1143674
Debt instrument, conversion price (in dollars per share) | $ / shares						$ 8.74
3.25% Convertible Senior Notes Due 2020
Significant Accounting Policies [Line Items]
Long term debt, face amount		$ 8,000,000.0					$ 0	27,974,000
Debt instrument, interest rate		3.25%					3.25%
3.25% Convertible Senior Notes Due 2020 | Oasis Management and Oasis Investments ll Master Fund Ltd.
Significant Accounting Policies [Line Items]
Long term debt, face amount		$ 8,000,000	$ 21,600,000	$ 21,600,000
Debt instrument, conversion price (in dollars per share) | $ / shares	$ 2.54
3.25% Convertible Senior Notes Due 2023
Significant Accounting Policies [Line Items]
Joint venture, ownership percentage			49.00%
Long term debt, face amount							$ 50,753,000	0
Debt instrument, interest rate		3.25%	3.25%				3.25%
Debt conversion ratio			1.00
Interest rate if paid in cash			3.25%
Interest rate if paid in stock			5.00%
Paid in kind interest rate			2.75%
Debt conversion price, percentage			105.00%
3.25% Convertible Senior Notes Due 2023 | Oasis Management and Oasis Investments ll Master Fund Ltd.
Significant Accounting Policies [Line Items]
Long term debt, face amount			$ 8,000,000
4.875% Convertible Senior Notes Due 2020
Significant Accounting Policies [Line Items]
Long term debt, face amount					$ 115,000,000		$ 1,905,000	113,000,000		$ 113,000,000
Debt instrument, interest rate			4.875%		4.875%		4.875%
Debt conversion ratio					0.1037613
Debt instrument, conversion price (in dollars per share) | $ / shares					$ 9.64
Convertible senior note payable, fair value							$ 1,700,000	93,200,000
Accounting Standards Update 2016-02
Significant Accounting Policies [Line Items]
Total											$ 40,800,000
Operating lease right-of-use assets, net											37,600,000
Deferred rent liabilities											4,300,000
Prepaid rent											$ 1,100,000
Joint Venture With Meisheng Culture & Creative Corp.
Significant Accounting Policies [Line Items]
Joint venture, ownership percentage							51.00%							50.00%
Oasis Management and Oasis Investments ll Master Fund Ltd. | After Modification Senior Notes (due 2018)
Significant Accounting Policies [Line Items]
Long term debt, face amount				$ 21,600,000.0
Oasis Management and Oasis Investments ll Master Fund Ltd. | 4.25% Convertible Senior Notes Due 2018
Significant Accounting Policies [Line Items]
Debt instrument, interest rate				4.25%
Oasis Management and Oasis Investments ll Master Fund Ltd. | 3.25% Convertible Senior Notes Due 2020
Significant Accounting Policies [Line Items]
Long term debt, face amount		$ 8,000,000		$ 21,600,000			$ 0	29,600,000.0
Debt conversion ratio	0.3937008	0.3222688		0.3280302
Debt instrument, conversion price (in dollars per share) | $ / shares	$ 2.54
Debt instrument, amount redeemed												$ 13,200,000
Debt conversion price, percentage	105.00%
Oasis Management and Oasis Investments ll Master Fund Ltd. | 3.25% Convertible Senior Notes Due 2023
Significant Accounting Policies [Line Items]
Long term debt, face amount			$ 8,000,000.0				$ 37,600,000	$ 0