CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) shares in Thousands, $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Statement of Financial Position [Abstract]
Prepaid royalties to a related party	$ 0	$ 7,949
Long-term prepaid royalties to a related party	0	2,051
Intangible assets acquired from a related party	0	5,000
Accrued royalties and license fees to a related party	0	10,449
Long-term accrued royalties to a related party	$ 0	$ 2,051
Preferred stock, par value	$ 0.0001	$ 0.0001
Preferred stock, shares authorized	5,000	5,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.0001	$ 0.0001
Common stock, shares authorized	250,000	250,000
Common stock, shares issued	133,464	131,580
Common stock, shares outstanding	133,464	131,580