Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	6 Months Ended		12 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Cash flows from operating activities:
Net income (loss)	$ 11,395	$ 3,189	$ 22,875	$ (8,007)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation and amortization	7,526	8,096	15,439	16,183
Realized gain from sale of marketable securities	(12)	(7)	(14)	(7)
Loss on disposition of fixed assets		61	11	61
Stock-based compensation to employees and directors	1,568	1,643	3,452	2,986
Amortization of debt discount and deferred loan costs	9	37	45	104
Loss on investment in precious metals	382		382
Loss from early extinguishment of debt				1,226
Restructuring charges (reversals)	(471)	98	(493)	98
Changes in operating assets and liabilities:
Restricted cash	125	(8)	264	351
Accounts receivable, net	4,691	3,417	(4,498)	(3,442)
Inventories, net	5,475	1,919	85	(4)
Prepaid inventories, net	260	(727)	102	(77)
Prepaids and other assets	(4,801)	(2,890)	(617)	975
Other long-term assets, net	123	889	(1,033)	499
Accounts payable	(12,924)	(29,651)	8,825	1,806
Accrued liabilities	(693)	(12,352)	11,200	3,373
Deferred revenue	(8,552)	(3,715)	5,596	2,809
Other long-term liabilities	(580)	60	(14)	324
Net cash provided by (used in) operating activities	3,521	(29,941)	61,607	19,258
Cash flows from investing activities:
Purchases of marketable securities	(95)	(55)	(122)	(136)
Purchases of intangible assets		(6)		(10)
Sales of marketable securities	152	154	152	154
Investment in precious metals			(1,397)
Expenditures for fixed assets, including internal-use software and website development	(9,296)	(6,503)	(15,282)	(11,220)
Proceeds from sale of fixed assets		55	1	55
Net cash used in investing activities	(9,239)	(6,355)	(16,648)	(11,157)
Cash flows from financing activities:
Payments on capital lease obligations	(2,563)	(112)	(2,563)	(274)
Drawdowns on line of credit				17,000
Payments on line of credit			(17,000)
Capitalized financing costs				(140)
Proceeds from finance obligations				681
Payments on finance obligations				(22,852)
Paydown on direct financing arrangement	(126)	(115)	(247)	(225)
Payments to retire convertible senior notes				(24,505)
Proceeds from exercise of stock options	986		986
Purchase of treasury stock	(1,389)	(464)	(1,396)	(468)
Net cash used in financing activities	(3,092)	(691)	(20,220)	(30,783)
Net increase (decrease) in cash and cash equivalents	(8,810)	(36,987)	24,739	(22,682)
Cash and cash equivalents, beginning of period	93,547	96,985	59,998	82,680
Cash and cash equivalents, end of period	84,737	59,998	84,737	59,998
Cash paid during the period:
Interest paid	39	294	327	1,472
Taxes paid	293	4	588	4
Non-cash investing and financing activities:
Fixed assets, including internal-use software and website development, costs financed through accounts payable and accrued liabilities	127	279	350	(666)
Equipment acquired under capital lease obligations	2,563		2,563	1,391
Lapse of rescission rights of redeemable stock				$ 109