CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS) (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Revenues:
Royalty and license	$ 6,785	$ 7,615	$ 15,791	$ 21,063
Development, services, and other	245	249	463	424
Total revenues	7,030	7,864	16,254	21,487
Costs and expenses:
Cost of revenues	54	61	97	87
Sales and marketing	3,461	3,397	6,766	7,200
Research and development	2,826	2,966	6,022	7,278
General and administrative	15,600	11,001	31,132	21,091
Total costs and expenses	21,941	17,425	44,017	35,656
Operating loss	(14,911)	(9,561)	(27,763)	(14,169)
Interest and other income	165	33	304	245
Loss from continuing operations before benefit (provision) for income taxes	(14,746)	(9,528)	(27,459)	(13,924)
Benefit (provision) for income taxes	(99)	3,323	(251)	5,024
Loss from continuing operations	(14,845)	(6,205)	(27,710)	(8,900)
Income from discontinued operations, net of tax	0	649	0	649
Net loss	$ (14,845)	$ (5,556)	$ (27,710)	$ (8,251)
Basic and diluted net loss per share:
Basic and diluted net loss per share - Continuing operations (in dollars per share)	$ (0.51)	$ (0.22)	$ (0.95)	$ (0.31)
Basic and diluted net loss per share - Discontinued operations (in dollars per share)	0.00	0.02	0.00	0.02
Basic and diluted net loss per share (in dollars per share)	$ (0.51)	$ (0.20)	$ (0.95)	$ (0.29)
Shares used in computation of basic and diluted net loss per share (weighted average common shares outstanding)	29,193	28,834	29,109	28,663
Other comprehensive income (loss), net of tax
Change in unrealized gains (losses) on short-term investments	$ (2)	$ 23	$ (24)	$ 55
Total other comprehensive income (loss)	(2)	23	(24)	55
Total comprehensive loss	$ (14,847)	$ (5,533)	$ (27,734)	$ (8,196)