Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
ASSETS
Cash and cash equivalents	$ 13,342	$ 46,682
Restricted cash	150	150
Accounts receivable, net of allowance for doubtful accounts of $727 and $571 at March 31, 2012 and December 31, 2011, respectively	47,736	44,567
Inventories, net	40,222	37,888
Deferred tax assets, net	817	841
Other current assets	2,638	1,933
Total current assets	104,905	132,061
Property, plant and equipment, net	45,790	43,914
Goodwill	26,943	26,943
Other intangible assets, net	26,554	29,094
TOTAL ASSETS	204,192	232,012
LIABILITIES AND STOCKHOLDERS' EQUITY
Accounts payable	19,762	18,562
Accrued liabilities	6,897	8,397
Income taxes payable	727	3,876
Interest payable	463	2,097
Convertible senior notes, net of discount	66,601
Current portion of long-term debt	940	767
Total current liabilities	95,390	33,699
Convertible senior notes, net of discount		99,738
Long-term debt, less current portion	1,107	875
Warrant liability	20,497	16,622
Deferred tax liabilities, net	2,991	2,780
Total liabilities	119,985	153,714
Commitments and contingencies
Stockholders' equity:
Cumulative convertible preferred stock, $0.0001 par value, 100,000 shares authorized; zero shares issued and outstanding.
Common stock, $0.0001 par value, 80,000,000 shares authorized; 52,819,006 shares issued and 49,310,965 shares outstanding at March 31, 2012; 51,957,652 shares issued and 49,153,495 shares outstanding at December 31, 2011	5	5
Additional paid-in capital	169,320	166,814
Accumulated other comprehensive loss	(31)	(44)
Accumulated deficit	(83,204)	(86,810)
Treasury stock, at cost; 1,377,889 and 1,358,299 shares at March 31, 2012 and December 31, 2011, respectively	(1,883)	(1,667)
Total stockholders' equity	84,207	78,298
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 204,192	$ 232,012