Consolidated Statements Of Operations (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Consolidated Statements Of Operations [Abstract]
Revenue	$ 134,000	$ 77,362	$ 19,808
Cost of goods sold	64,365	36,205	23,427
Gross profit (loss)	69,635	41,157	(3,619)
Operating expenses:
General and administrative	11,336	9,883	4,811
Sales and marketing	1,658	1,267	1,137
Research and development	1,806	1,079	801
Loss on disposal of assets	84	234
Income (loss) from operations	54,751	28,694	(10,368)
Other income (expense):
Interest income	252	358	693
Interest expense			(2)
Realized loss on foreign currency translation	(370)	(20)
Realized gain on investments		8	47
Total other (expense) income	(118)	346	738
Income (loss) before income taxes	54,633	29,040	(9,630)
Income tax (expense) benefit	(16,574)	71
Net income (loss)	$ 38,059	$ 29,111	$ (9,630)
Net income (loss) per common share
Basic	$ 1.67	$ 1.34	$ (0.48)
Diluted	$ 1.61	$ 1.28	$ (0.48)
Weighted average common shares outstanding used in computing net income (loss) per common share
Basic	22,852,205	21,726,090	20,117,543
Diluted	23,596,162	22,790,896	20,117,543