Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Cash flows from operating activities:
Net income (loss)	$ 49,791	$ 31,408	$ (43,465)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Change in fair value of warrant liability	(2,649)	(9,571)	21,464
Depreciation and amortization	11,583	10,105	13,768
Amortization of deferred financing costs	946	3,126	3,914
Accretion of debt discount	3,710	5,295	4,946
Provision for doubtful accounts	512	661	94
Provision for inventory reserves and market adjustments	1,417	1,011	771
Gain on sale of assets	(4,819)	(3,378)	(1,261)
Impairment of goodwill, intangible assets or fixed assets	0	0	9,288
Stock compensation expense	13,421	7,437	4,684
Deferred income tax (benefit) provision	(18,746)	1,218	(3,611)
(Excess) reduction in tax benefit related to share-based awards	(528)	(570)	1,744
Non-cash loss on extinguishment of debt	4,841	3,225	995
Changes in current assets and liabilities:
Restricted cash	0	0	(140)
Accounts receivable	1,796	(17,918)	(12,792)
Inventories	(8,706)	(11,054)	(1,384)
Other current assets	(2,073)	(892)	(170)
Accounts payable	2,527	5,041	5,499
Accrued liabilities	(1,894)	(255)	4,608
Income taxes payable	369	7,563	3,634
Interest payable	(1,983)	(29)	(487)
Net cash provided by operating activities	49,515	32,423	12,099
Cash flows from investing activities:
Capital expenditures	(20,701)	(9,984)	(6,060)
Proceeds from sale of assets	5,521	5,286	5,460
Purchase of patents and other intangible assets	(20)	(244)	0
Net cash used in investing activities	(15,200)	(4,942)	(600)
Cash flows from financing activities:
Repayments of indebtedness	(102,438)	(33,273)	(38,572)
Excess (reduction in) tax benefit related to share-based awards	528	570	(1,744)
Purchase of treasury stock	(2,034)	(775)	(236)
Proceeds from sale of common stock	161	29,438	0
Proceeds from exercise of stock options	167	147	3
Proceeds from exercise of warrants	421	4,793	4,453
Debt issuance costs	(106)	(1,421)	(2,004)
Proceeds from borrowings	25,000	0	40,000
Net cash (used in) provided by financing activities	(78,301)	(521)	1,900
Effect of changes in exchange rates on cash and cash equivalents	4	(141)	(21)
Net (decrease) increase in cash and cash equivalents	(43,982)	26,819	13,378
Cash and cash equivalents at beginning of year	46,682	19,863	6,485
Cash and cash equivalents at end of year	$ 2,700	$ 46,682	$ 19,863