Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 29, 2019	Jun. 30, 2018	Jun. 29, 2019	Jun. 30, 2018
Income Statement [Abstract]
Total revenues	$ 10,426	$ 10,304	$ 21,021	$ 19,813
Cost of revenues	5,877	6,036	12,215	11,623
Gross profit	4,549	4,268	8,806	8,190
Operating expenses:
Research and development	929	901	1,887	2,005
Sales and marketing	3,462	4,168	7,553	8,218
General and administrative	2,626	2,481	4,870	4,866
Total operating expenses	7,017	7,550	14,310	15,089
Loss from operations	(2,468)	(3,282)	(5,504)	(6,899)
Other income, net	58	6	52	24
Loss from operations before provision for income taxes	(2,410)	(3,276)	(5,452)	(6,875)
Provision for income taxes	9	4	15	8
Net loss	$ (2,419)	$ (3,280)	$ (5,467)	$ (6,883)
Net loss per share:
Basic	$ (0.18)	$ (0.28)	$ (0.40)	$ (0.59)
Diluted	$ (0.18)	$ (0.28)	$ (0.40)	$ (0.59)
Weighted average shares used in computing net loss per common share:
Basic	13,648	11,644	13,639	11,636
Diluted	13,648	11,644	13,639	11,636