CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended
Mar. 29, 2019	Mar. 30, 2018
Cash flows from operating activities:
Net loss	$ (643)	$ (71)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	66	67
Provision for excess and obsolete inventory	0	99
Noncash lease expense	138	130
Other	(16)	93
Changes in operating assets and liabilities:
Increase in accounts receivable	(502)	(1,190)
Decrease in lease receivable	64	60
Increase in inventories	(278)	(446)
Decrease (increase) in contract revenue in excess of billings	959	(752)
Increase in prepaid expenses and other assets	(32)	(95)
Decrease in accounts payable	(264)	(492)
Increase in accrued liabilities	244	347
Decrease in accrued pension and retirement liabilities	(46)	(61)
Increase (decrease) in billings in excess of contract revenue	(1,545)	2,054
Decrease in operating lease liability	(139)	(129)
Net cash used in operating activities	(1,994)	(386)
Cash flows from investing activities:
Purchases of property and equipment	(58)	(14)
Proceeds from sale of property and equipment	0	3
Net cash used in investing activities	(58)	(11)
Cash flows from financing activities:
Proceeds for shares issued on exercise of options	21	0
Principal payments on long-term debt	(59)	(55)
Net cash used in financing activities	(38)	(55)
Net decrease in cash, cash equivalents, and restricted cash	(2,090)	(452)
Cash, cash equivalents, and restricted cash as of beginning of the period	8,585	5,588
Cash, cash equivalents, and restricted cash as of end of the period	6,495	5,136
Supplemental disclosures of cash flow information
Interest	22	25
Income taxes	$ 9	$ 25

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