Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended		12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Cash flows from operating activities:
Net income	$ 14,928	$ 5,882	$ 23,715	$ 2,473
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	10,833	11,935	14,907	15,813
Realized gain from sale of marketable securities	(28)	(8)	(29)	(8)
Loss on disposition of fixed assets	0	72	0	72
Stock-based compensation to employees and directors	2,377	2,624	3,280	3,264
Amortization of debt discount and deferred loan costs	14	55	32	105
Loss on investment in precious metals	475	0	475	0
Loss from early extinguishment of debt	0	0	0	1,199
Restructuring charges (reversals)	(471)	53	(448)	53
Changes in operating assets and liabilities:
Restricted cash	125	(24)	280	323
Accounts receivable, net	4,601	(519)	(652)	(5,575)
Inventories, net	3,731	1,603	(1,343)	(2,180)
Prepaid inventories, net	(14)	(641)	(258)	(253)
Prepaids and other assets	(2,995)	(314)	(1,387)	2,448
Other long-term assets, net	(445)	(1,160)	448	(1,332)
Accounts payable	(7,779)	(26,958)	11,277	761
Accrued liabilities	(2,308)	(7,478)	4,711	2,981
Deferred revenue	(8,553)	836	1,044	7,634
Other long-term liabilities	(707)	705	(786)	848
Net cash provided by (used in) operating activities	13,784	(13,337)	55,266	28,626
Cash flows from investing activities:
Purchases of marketable securities	(111)	(69)	(124)	(110)
Purchases of intangible assets	(13)	(6)	(13)	(3)
Sales of marketable securities	291	154	291	154
Investment in precious metals	(5,980)	0	(7,377)	0
Expenditures for fixed assets, including internal-use software and website development	(13,970)	(10,563)	(15,896)	(12,960)
Proceeds from sale of fixed assets	0	56	0	56
Net cash used in investing activities	(19,783)	(10,428)	(23,119)	(12,863)
Cash flows from financing activities:
Payments on capital lease obligations	(2,563)	(112)	(2,563)	(188)
Payments on line of credit	0	0	(17,000)	0
Capitalized financing costs	0	0	0	(19)
Payments on finance obligations	0	0	0	(21,528)
Paydown on direct financing arrangement	(192)	(175)	(253)	(231)
Proceeds from exercise of stock options	1,458	0	1,458	0
Purchase of treasury stock	(1,389)	(464)	(1,396)	(466)
Net cash used in financing activities	(2,686)	(751)	(19,754)	(22,432)
Net increase (decrease) in cash and cash equivalents	(8,685)	(24,516)	12,393	(6,669)
Cash and cash equivalents, beginning of period	93,547	96,985	72,469	79,138
Cash and cash equivalents, end of period	84,862	72,469	84,862	72,469
Cash paid during the period:
Interest paid	56	436	202	991
Taxes paid	598	139	758	139
Non-cash investing and financing activities:
Fixed assets, including internal-use software and website development, costs financed through accounts payable and accrued liabilities	89	581	10	278
Equipment acquired under capital lease obligations	$ 2,563	$ 0	$ 2,563	$ 0