Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 29, 2018	Dec. 30, 2017
Income Statement [Abstract]
Total revenues	$ 42,600	$ 41,593
Cost of revenues	25,129	26,090
Gross profit	17,471	15,503
Operating expenses:
Research and development	4,006	5,208
Sales and marketing	16,782	14,541
General and administrative	9,551	8,782
Gain on sale of intellectual property		(175)
Impairment of long-lived assets		35
Total operating expenses	30,339	28,391
Loss from operations	(12,868)	(12,888)
Other income (expense), net	92	(107)
Loss from operations before provision for (benefit from) income taxes	(12,776)	(12,995)
Provision for (benefit from) income taxes	37	(128)
Net loss	$ (12,813)	$ (12,867)
Net loss per share:
Basic	$ (1.05)	$ (1.11)
Diluted	$ (1.05)	$ (1.11)
Weighted average shares used in computing net loss per common share:
Basic	12,199	11,555
Diluted	12,199	11,555