Condensed Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Net revenue	$ 59,591	$ 42,680	$ 119,802	$ 80,960
Cost of sales	36,373	36,174	78,126	68,692
Gross profit	23,218	6,506	41,676	12,268
Operating expenses:
Product development	4,480	4,058	8,741	8,689
Selling, general and administrative	8,080	7,293	16,947	14,920
Equity in net loss (income) of joint ventures	160	(105)	603	351
Total operating expenses	12,720	11,246	26,291	23,960
Termination fee			5,000
Gain on previously held equity interest	2,936		2,936
Income (loss) from operations	13,434	(4,740)	23,321	(11,692)
Interest income and other	34	72	50	150
Interest expense	(98)	(48)	(163)	(1,463)
Income (loss) before income taxes	13,370	(4,716)	23,208	(13,005)
Provision for income taxes
Net income (loss)	$ 13,370	$ (4,716)	$ 23,208	$ (13,005)
Net income (loss) per common share:
Basic	$ 0.47	$ (0.17)	$ 0.82	$ (0.47)
Diluted	$ 0.46	$ (0.17)	$ 0.81	$ (0.47)
Weighted-average of shares used to compute net income (loss) per common share:
Basic	28,163	27,936	28,149	27,925
Diluted	28,828	27,936	28,772	27,925