CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Revenues:
Revenue	$ 11,010	$ 5,668	$ 18,169	$ 11,925
Costs and expenses:
Cost of revenues	41	62	70	106
Sales and marketing	1,194	1,255	2,300	2,971
Research and development	1,332	1,323	2,639	3,012
General and administrative	2,636	4,087	4,860	11,443
Total costs and expenses	5,203	6,727	9,869	17,532
Operating income (loss)	5,807	(1,059)	8,300	(5,607)
Interest and other income (loss), net	40	388	(276)	160
Income (loss) before provision for income taxes	5,847	(671)	8,024	(5,447)
Provision for income taxes	(506)	(41)	(647)	(93)
Net income (loss)	$ 5,341	$ (712)	$ 7,377	$ (5,540)
Basic net loss per share (in dollars per share)	$ 0.17	$ (0.03)	$ 0.25	$ (0.19)
Shares used in calculating basic net loss per share (in shares)	30,982	27,634	29,787	29,320
Diluted net loss per share (in dollars per share)	$ 0.17	$ (0.03)	$ 0.24	$ (0.19)
Shares used in calculating diluted net loss per share (in shares)	31,247	27,634	30,253	29,320
Other comprehensive income (loss)
Change in unrealized gains (loss) on short-term investments	$ 0	$ 0	$ 0	$ (2)
Total other comprehensive income (loss)	0	0	0	(2)
Total comprehensive income (loss)	5,341	(712)	7,377	(5,542)
Royalty and license
Revenues:
Revenue	10,881	5,593	17,949	11,775
Development, services, and other
Revenues:
Revenue	$ 129	$ 75	$ 220	$ 150