Consolidated Statements of Operations - USD ($) shares in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Income Statement [Abstract]
Revenue	$ 18,730,000	$ 18,276,000
Cost of revenue	8,551,000	6,722,000
Gross profit	10,179,000	11,554,000
Operating expenses:
Research and development	4,223,000	3,558,000
Selling and marketing	4,205,000	2,469,000
General and administrative	5,233,000	4,609,000
Total operating expenses	13,661,000	10,636,000
Operating income (loss)	(3,482,000)	918,000
Interest and other income (expense)	481,000	(5,386,000)
Income (loss) before income taxes and equity loss in investee	(3,001,000)	(4,468,000)
Provision for (benefit from) income taxes	(1,015,000)	920,000
Income (loss) before equity loss in investee	(1,986,000)	(5,388,000)
Equity loss in investee	(524,000)	0
Income (loss) from continuing operations	(2,510,000)	(5,388,000)
Income (loss) from discontinued operations	0	41,000
Net income (loss)	$ (2,510,000)	$ (5,347,000)
Income (loss) per common share:
Basic and Diluted	$ (0.14)	$ (1.00)
Weighted-average common shares:
Basic and Diluted	17,739	13,710