BALANCE SHEET COMPONENTS (Tables)

12 Months Ended

Dec. 31, 2017

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Schedule of balance sheet components

	December 31, 2017			January 1, 2017
	(in thousands)
Inventories:
Work-in-process	$	2,894		1,538
Finished goods	665			479
	$	3,559		$	2,017
Other current assets:
Prepaid expenses	$	836		$	960
Other	161			163
	$	997		$	1,123
Property and equipment:
Equipment	$	10,996		$	11,524
Software	3,139			2,624
Furniture and fixtures	46			41
Leasehold improvements	674			708
	14,855			14,897
Accumulated depreciation and amortization	(12,480		)	(12,132		)
	$	2,375		$	2,765
Accrued liabilities:
Employee compensation related accruals	$	1,143		$	1,222
Other	510			358
	$	1,653		$	1,580