CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017
Cash flows from operating activities:
Net income	$ 3,747	$ 1,481
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	263	259
Deferred pension costs	200	(30)
Provision for excess and obsolete inventory	427	105
Other	167	34
Changes in operating assets and liabilities:
Accounts receivable	496	(380)
Lease receivable	247	252
Inventories	(449)	(327)
Contract revenue in excess of billings	33	(1,651)
Prepaid expenses and other assets	(237)	(543)
Accounts payable	(140)	509
Accrued liabilities	147	(488)
Accrued pension and retirement liabilities	(428)	(201)
Billings in excess of contract revenue	(306)	305
Deferred rent obligation	(438)	(423)
Net cash provided by (used in) operating activities	3,729	(1,098)
Cash flows from investing activities:
Purchases of property and equipment	(136)	(148)
Proceeds from sale of property and equipment	35	0
Net cash used in investing activities	(101)	(148)
Cash flows from financing activities:
Principal payments on long-term debt	(224)	(211)
Principal payments on pension settlement obligation	(407)	(381)
Net cash used in financing activities	(631)	(592)
Net increase (decrease) in cash, cash equivalents, and restricted cash	2,997	(1,838)
Cash, cash equivalents, and restricted cash as of beginning of the year	5,588	7,426
Cash, cash equivalents, and restricted cash as of end of the year	8,585	5,588
Supplemental disclosures of non-cash investing and financing activities
ASC 606 transition adjustment	683	0
Cash paid during the year for:
Interest	439	478
Income taxes	$ 133	$ 141

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