Condensed Consolidated Balance Sheets (Unaudited) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 10,725	$ 46,682
Restricted cash	150	150
Accounts receivable, net of allowance for doubtful accounts of $788 and $571 at June 30, 2012 and December 31, 2011, respectively	42,392	44,567
Inventories, net	40,977	37,888
Deferred tax assets, net	827	841
Other current assets	5,012	1,933
Total current assets	100,083	132,061
Property and equipment, net	48,918	43,914
Goodwill	26,943	26,943
Other intangible assets, net	25,734	29,094
TOTAL ASSETS	201,678	232,012
Current liabilities:
Accounts payable	16,570	18,562
Accrued liabilities	8,995	8,397
Income taxes payable	1,479	3,876
Interest payable	1,093	2,097
Convertible senior notes, net of discount	53,231
Current portion of long-term debt	968	767
Total current liabilities	82,336	33,699
Convertible senior notes, net of discount	53,231	99,738
Long-term debt, less current portion	1,022	875
Warrant liability		16,622
Deferred tax liabilities, net	2,994	2,780
Total liabilities	86,352	153,714
Commitments and contingencies
Stockholders' equity:
Cumulative convertible preferred stock, $0.0001 par value, 100,000 shares authorized; no shares issued and outstanding
Common stock, $0.0001 par value, 80,000,000 shares authorized; 52,872,524 shares issued and 49,678,844 shares outstanding at June 30, 2012; 51,957,652 shares issued and 49,153,495 shares outstanding at December 31, 2011	5	5
Additional paid-in capital	187,576	166,814
Accumulated other comprehensive income (loss)	(72)	(44)
Accumulated deficit	(70,026)	(86,810)
Treasury stock, at cost; 1,404,994 and 1,358,299 shares at June 30, 2012 and December 31, 2011, respectively	(2,157)	(1,667)
Total stockholders' equity	115,326	78,298
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 201,678	$ 232,012