Consolidated Statements of Operations (Unaudited) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Consolidated Statements of Operations [Abstract]
Revenue	$ 19,942	$ 33,637	$ 47,152	$ 114,635
Cost of goods sold	17,497	17,516	48,104	47,339
Gross profit (loss)	2,445	16,121	(952)	67,296
Operating expenses:
General and administrative	2,530	3,251	6,880	9,228
Sales and marketing	417	519	1,346	1,284
Research and development	639	466	1,712	1,303
Net (gain) loss on disposal of assets			(5)	7
Income (loss) from operations	(1,141)	11,885	(10,885)	55,474
Other income:
Interest income	12	56	68	207
Realized gain (loss) on foreign currency translation	277	(166)	308	(172)
Realized gain on investments	8		8
Total other income (expense)	297	(110)	384	35
Income (loss) before income taxes	(844)	11,775	(10,501)	55,509
Income tax benefit (expense)	1,116	(3,589)	6,094	(18,311)
Net income (loss)	$ 272	$ 8,186	$ (4,407)	$ 37,198
Net income (loss) per common share
Basic	$ 0.01	$ 0.36	$ (0.20)	$ 1.62
Diluted	$ 0.01	$ 0.35	$ (0.20)	$ 1.57
Weighted average common shares outstanding used in computing net income (loss) per common share
Basic	22,524,611	22,822,286	22,519,171	22,948,980
Diluted	23,050,618	23,410,525	22,519,171	23,760,859