Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Cash Flows from Operating Activities:
Net (Loss) Income	$ (37,823)	$ (68,563)	$ (56,433)
Adjustments to Reconcile Net (Loss) Income to Net Cash Provided by Operating Activities:
Depreciation and Amortization	17,739	17,505	17,392
Deferred Income Taxes	(3,246)	14,205	(12,064)
Stock-Based Compensation Expense	4,735	5,568	3,941
Provision for Inventory Obsolescence Reserves	6,349	3,723	26,162
Impairment and Loss on Disposal of Fixed Assets	1,498		4,392
Stock-Based Portion of Provision for Securities Class Action		16,760
Deconsolidation of Variable Interest Entity			1,457
Changes in Operating Assets and Liabilities:
Merchandise Inventories	32,614	(62,054)	42,773
Accounts Payable	(52,475)	64,025	(21,450)
Customer Deposits and Store Credits	6,001	(988)	(1,075)
Prepaid Expenses and Other Current Assets	28,962	(11,411)	(18,385)
Accrual for MDL and Related Other Matters	36,960
Other Assets and Liabilities	(1,922)	(6,317)	22,494
Net Cash Provided by Operating Activities	39,392	(27,547)	9,204
Cash Flows from Investing Activities:
Purchases of Property and Equipment	(7,411)	(8,908)	(22,478)
Proceeds from Disposal of Fixed Assets	2,273
Other Investing Activities	800	575
Net Cash Used in Investing Activities	(4,338)	(8,333)	(22,478)
Cash Flows from Financing Activities:
Payments for Stock Repurchases	(1,455)	(433)	(295)
Proceeds from the Exercise of Stock Options	1,347	539
Excess Tax Benefit from Stock-Based Compensation		54
Payments for Debt Issuance Costs		(933)
Payments on Financed Insurance Obligations	(734)
Payments on Capital Lease Obligations	(351)	(469)
Borrowings on Revolving Credit Facility	40,000	37,000	39,000
Payments on Revolving Credit Facility	(65,000)	(17,000)	(19,000)
Net Cash Provided by (Used in) Financing Activities	(26,193)	18,704	19,705
Effect of Exchange Rates on Cash and Cash Equivalents	806	744	(15)
Net Increase (Decrease) in Cash and Cash Equivalents	9,667	(16,432)	6,416
Cash and Cash Equivalents, Beginning of Year	10,271	26,703	20,287
Cash and Cash Equivalents, End of Year	19,938	10,271	$ 26,703
Supplemental disclosure of non-cash operating and financing activities [Abstract]
Financed Insurance Premiums	$ 1,346
Supplemental disclosure of non-cash investing and financing activities:
Borrowing on capital lease obligation to acquire equipment		$ 351