Unaudited Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Cash flows from operating activities:
Net income	$ 7,765	$ 3,606
Adjustments to reconcile net income to net cash provided by operating activities:
Change in fair value of warrant liability	0	3,875
Depreciation and amortization	3,033	2,648
Amortization of deferred financing costs	12	290
Accretion of debt discount	55	1,014
Gain on sale of assets	(1,132)	(1,043)
Stock compensation expense	2,241	2,178
Deferred income tax provision	301	530
Excess tax benefit related to share-based awards	(602)	(295)
Non-cash loss on extinguishment of debt	0	3,590
Changes in current assets and liabilities:
Restricted cash	150	0
Accounts receivable, net	(3,908)	(3,169)
Inventories	341	(2,334)
Other current assets	1,814	(98)
Accounts payable	(2,369)	1,200
Accrued liabilities	161	(1,494)
Income taxes payable	161	(3,149)
Interest payable	(14)	(1,634)
Net cash provided by operating activities	8,009	5,715
Cash flows from investing activities:
Capital expenditures	(4,383)	(4,119)
Proceeds from sale of assets	1,388	1,230
Purchase of patents and other intangible assets	0	(15)
Net cash used in investing activities	(2,995)	(2,904)
Cash flows from financing activities:
Repayments of indebtedness	(6,103)	(36,276)
Borrowings on revolving credit facility	10,000	0
Repayments on revolving credit facility	(9,244)	0
Excess tax benefit related to share-based awards	602	295
Purchase of treasury stock	(2,658)	(216)
Proceeds from sale of common stock	150	0
Proceeds from exercise of stock options	7	33
Issuance costs of preferred stock and detachable warrants	(200)	0
Net cash used in financing activities	(7,446)	(36,164)
Effect of changes in exchange rates on cash and cash equivalents	(20)	13
Net decrease in cash and cash equivalents	(2,452)	(33,340)
Cash and cash equivalents at the beginning of period	2,700	46,682
Cash and cash equivalents at the end of period	$ 248	$ 13,342