Consolidated Statements of Operations (Unaudited) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Consolidated Statements of Operations [Abstract]
Total Revenue	$ 17,003	$ 43,028	$ 27,210	$ 80,998
Cost of goods sold	16,992	15,828	30,607	29,823
Gross profit (loss)	11	27,200	(3,397)	51,175
Operating expenses:
General and administrative	2,044	3,056	4,350	5,977
Sales and marketing	473	388	929	765
Research and development	597	410	1,073	837
(Gain) loss on disposal of assets	(5)	7	(5)	7
Income (loss) from operations	(3,098)	23,339	(9,744)	43,589
Other income:
Interest income	23	64	56	151
Realized gain (loss) on foreign currency translation	(311)		31	(6)
Total other income (expense)	(288)	64	87	145
Income (loss) before income taxes	(3,386)	23,403	(9,657)	43,734
Income tax benefit (expense)	2,074	(13,495)	4,978	(14,722)
Net income (loss)	$ (1,312)	$ 9,908	$ (4,679)	$ 29,012
Net income (loss) per common share
Basic	$ (0.06)	$ 0.43	$ (0.21)	$ 1.26
Diluted	$ (0.06)	$ 0.41	$ (0.21)	$ 1.21
Weighted average common shares outstanding used in computing net income (loss) per common share
Basic	22,518,364	23,031,039	22,516,451	23,012,326
Diluted	22,518,364	23,928,408	22,516,451	23,936,026