Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Assets
Cash and cash equivalents	$ 88,886	$ 89,745
Accounts receivable, net of allowances of $10	21,947	35,554
Accounts receivable – related parties	170	123
Inventory	67,952	57,439
Prepaid expenses	1,244	1,460
Marketable securities	68,194	56,294
Other current assets	2,139	1,910
Total current assets	250,532	242,525
Property, plant and equipment, net	139,952	140,517
Other assets	2,173	2,202
Total noncurrent assets	142,125	142,719
Total Assets	392,657	385,244
Liabilities and Stockholders’ Equity
Accounts payable	21,441	18,665
Accounts payable - related parties	329	3,023
Income taxes payable	4,321	1,123
Current deferred income tax liability	6,686	6,162
Deferred revenue – short-term	3,558	3,558
Accrued expenses and other current liabilities	3,542	3,225
Accrued expenses and other current liabilities - related parties	17	43
Total current liabilities	39,894	35,799
Deferred revenue – long-term	28,365	29,256
Contingent liability – long-term	2,521	2,521
Other noncurrent liabilities	930	924
Noncurrent deferred income tax liability	28,522	28,506
Total noncurrent liabilities	60,338	61,207
Total Liabilities	100,232	97,006
Commitments and contingencies
Preferred stock, $0.0001 par value, 5,000,000 shares authorized, none issued and outstanding
Common stock, $0.0001 par value, 75,000,000 shares authorized, 41,319,057 and 41,308,446 issued and outstanding as of March 31, 2012 and December 31, 2011, respectively	4	4
Accumulated other comprehensive income	2,929	1,803
Additional paid in capital	253,585	253,505
Retained earnings	35,907	32,926
Total stockholders’ equity	292,425	288,238
Total Liabilities and Stockholders’ Equity	$ 392,657	$ 385,244