Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended		12 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2013	Mar. 31, 2012
Cash flows from operating activities:
Net income (loss)	$ 7,697	$ 2,719	$ 19,647	$ (16,275)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation and amortization	3,863	4,034	15,838	16,385
Realized gain from sale of marketable securities	(12)	(7)	(14)	(7)
Loss (gain) on disposition of fixed assets		85	(13)	85
Stock-based compensation to employees and directors	752	813	3,466	2,988
Amortization of debt discount and deferred loan costs	5	35	43	128
Loss from early extinguishment of debt				1,226
Restructuring charges (reversals)	(432)	98	(454)	98
Changes in operating assets and liabilities:
Restricted cash	125	(17)	273	330
Accounts receivable, net	3,422	1,560	(3,910)	(4,060)
Inventories, net	4,929	6,348	(4,890)	3,518
Prepaid inventories, net	(76)	(883)	(78)	(124)
Prepaids and other assets	1,462	3,156	(400)	1,581
Other long-term assets, net	53	694	(908)	244
Accounts payable	(15,729)	(27,587)	3,956	3,386
Accrued liabilities	(748)	(12,211)	11,004	(1,952)
Deferred revenue	(6,880)	(1,164)	4,717	4,695
Other long-term liabilities	(84)	93	449	411
Net cash provided by (used in) operating activities	(1,653)	(22,234)	48,726	12,657
Cash flows from investing activities:
Purchases of marketable securities	(75)	(38)	(119)	(159)
Purchases of intangible assets			(6)	(4)
Sales of marketable securities	152	117	189	117
Investment in precious metals			(1,397)
Expenditures for fixed assets, including internal-use software and website development	(6,062)	(2,127)	(16,424)	(9,192)
Proceeds from sale of fixed assets			56
Net cash used in investing activities	(5,985)	(2,048)	(17,701)	(9,238)
Cash flows from financing activities:
Payments on capital lease obligations	(2,563)	(77)	(2,598)	(735)
Drawdowns on line of credit				17,000
Payments on line of credit			(17,000)
Capitalized financing costs				(140)
Proceeds from finance obligations				1,429
Payments on finance obligations				(23,939)
Paydown on direct financing arrangement	(62)	(57)	(241)	(221)
Payments to retire convertible senior notes				(24,505)
Purchase of treasury stock	(1,389)	(464)	(1,396)	(479)
Net cash used in financing activities	(4,014)	(598)	(21,235)	(31,590)
Net increase (decrease) in cash and cash equivalents	(11,652)	(24,880)	9,790	(28,171)
Cash and cash equivalents, beginning of period	93,547	96,985	72,105	100,276
Cash and cash equivalents, end of period	81,895	72,105	81,895	72,105
Cash paid during the period:
Interest paid	20	149	453	2,142
Taxes paid	283	2	580	2
Non-cash investing and financing activities:
Fixed assets, including internal-use software and website development, costs financed through accounts payable and accrued liabilities	116	121	497	12
Equipment acquired under capital lease obligations	2,563		2,563
Equipment acquired under finance obligations				4,532
Lapse of rescission rights of redeemable stock				$ 398