Consolidated Statements Of Operations (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Consolidated Statements Of Operations [Abstract]
Revenue	$ 10,207	$ 37,970
Cost of goods sold	13,615	13,995
Gross profit (loss)	(3,408)	23,975
Operating expenses:
General and administrative	2,306	2,921
Sales and marketing	456	377
Research and development	476	427
Income (loss) from operations	(6,646)	20,250
Other income:
Interest income	33	87
Realized gain (loss) on foreign currency translation	342	(6)
Total other income	375	81
Income (loss) before income taxes	(6,271)	20,331
Income tax benefit (expense)	2,904	(1,227)
Net income (loss)	$ (3,367)	$ 19,104
Net income (loss) per common share
Basic	$ (0.15)	$ 0.83
Diluted	$ (0.15)	$ 0.80
Weighted average common shares outstanding used in computing net income (loss) per common share
Basic	22,514,539	22,993,614
Diluted	22,514,539	23,943,644