Condensed Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	9 Months Ended
Sep. 28, 2019	Sep. 29, 2018
Cash flows from operating activities:
Net loss	$ (10,677)	$ (12,734)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	132	209
Interest accrued on convertible promissory notes	332	241
Amortization of debt discounts	401	192
Non-cash lease expense	417
Stock-based compensation	782	571
Issuance of warrant in lieu of payment		69
Changes in operating assets and liabilities:
Accounts receivable	429	(229)
Inventories	548	226
Prepaid expenses and other current assets	(7)	142
Accounts payable	(977)	3,534
Accrued payroll and related liabilities	(129)	(304)
Accrued expenses and other current liabilities	(483)	2
Net cash used in operating activities	(9,232)	(8,081)
Cash flows from investing activities:
Acquisition of property and equipment	(70)	(72)
Net cash used in investing activities	(70)	(72)
Cash flows from financing activities:
Net (repayments) borrowings under line of credit	(778)	573
Proceeds from issuance of debt, net of $170 discount		2,100
Debt issuance costs		(23)
Payments on debt	(376)	(344)
Proceeds from issuance of common stock, net	2,457	15,764
Proceeds from exercise of stock options	22
Payments for taxes related to net share settlement of equity awards	(39)
Net cash (used in) provided by financing activities	1,286	18,070
Net change in cash, cash equivalents and restricted cash	(8,016)	9,917
Cash, cash equivalents and restricted cash at beginning of period	16,652	9,520
Cash, cash equivalents and restricted cash at end of period	$ 8,636	$ 19,437

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