CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jul. 01, 2016
Cash flows from operating activities:
Net income (loss)	$ 14	$ (733)
Adjustments to reconcile net income (loss) to net cash used in operating activities:
Depreciation and amortization	129	145
Provision for excess and obsolete inventory	48	124
Other	1	79
Changes in assets and liabilities:
Decrease (increase) in restricted cash	382	(1)
Decrease (increase) in accounts receivable	(664)	1,034
Decrease in lease receivable	134	0
Decrease (increase) in inventories	323	(483)
Increase in costs and estimated earnings in excess of billings on uncompleted contracts, net	(644)	(355)
Decrease (increase) in prepaid expenses and other assets	(775)	222
Increase (decrease) in accounts payable	(300)	51
Increase (decrease) in accrued liabilities	(46)	271
Decrease in pension and retirement obligations	(115)	(75)
Increase (decrease) in customer deposits	809	(396)
Decrease in deferred rent obligation	(211)	(211)
Net cash used in operating activities	(915)	(328)
Cash flows from investing activities:
Purchases of property and equipment	(86)	(49)
Net cash used in investing activities	(86)	(49)
Cash flows from financing activities:
Principal payments on long-term debt	(105)	(115)
Net cash used in financing activities	(105)	(115)
Net decrease in cash and cash equivalents	(1,106)	(492)
Cash and cash equivalents as of beginning of the period	6,823	3,734
Cash and cash equivalents as of end of the period	5,717	3,242
Cash paid during the period for:
Interest	56	72
Income taxes	$ 120	$ 11