CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS (unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Income Statement [Abstract]
Revenues	$ 11,233	$ 20,673
Cost of revenues	2,754	4,658
Gross profit	8,479	16,015
Operating expenses:
Engineering and product development	314	338
Selling and marketing	7,803	15,931
General and administrative	3,965	$ 4,042
Loss on sale of assets	843
Total operating expenses	12,925	$ 20,311
Loss from continuing operations before interest and other financing expense, net	(4,446)	(4,296)
Interest and other financing expense, net	(333)	(2,556)
Loss from continuing operations before income taxes	(4,779)	(6,852)
Income tax expense	(93)	(365)
Loss from continuing operations	$ (4,872)	(7,217)
Discontinued operations:
Loss from discontinued operations, net of taxes		(2,796)
Net loss	$ (4,872)	$ (10,013)
Basic net loss per share:
Continuing operations (in dollars per share)	$ (0.23)	$ (0.27)
Discontinued operations (in dollars per share)		(0.24)
Basic (in dollars per share)	$ (0.23)	$ (0.51)
Shares used in computing net loss per share:
Basic and diluted (in shares)	20,777,321	19,794,210
Other comprehensive loss:
Foreign currency translation adjustments	$ (88)	$ (1,210)
Comprehensive loss	$ (4,960)	$ (11,223)