Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Reconciliation of net income to net cash provided by operating activities
Net income	$ 1,959	$ 1,687
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation and amortization	1,793	1,247
Allowance for doubtful accounts	119	6
Gain on sale of fixed assets	(46)	(126)
Stock compensation	270	242
Deferred taxes	459	153
(Increase) decrease in
Accounts receivable - billed	(561)	(3,320)
Accounts receivable - unbilled	1,003	(1,062)
Inventories	1,318	(45)
Refundable income taxes	477	450
Prepaid expenses and other assets	(286)	(130)
Increase (decrease) in
Accounts payable - trade	(1,032)	1,153
Accrued expenses and other liabilities	(485)	22
Deferred revenue	450	539
Accrued compensation	(481)	325
Deferred buy-back lease obligation	(444)	6,592
Customer deposits	(581)	739
Net cash provided by operating activities	3,932	8,472
Cash Flows From Investing Activities
Purchases of investment securities available-for-sale	(32)	(33)
Purchases of property and equipment	(4,513)	(5,234)
Deferred buy-back lease asset	(358)	(5,507)
Proceeds from sale of fixed assets	162	132
Net cash absorbed by investing activities	(4,741)	(10,642)
Cash Flows From Financing Activities
Proceeds from the line-of-credit construction draw	500	1,000
Repayments on the line-of-credit construction draw	(1,500)	0
Proceeds from long-term borrowings	2,277	630
Repayments of long-term borrowings	(769)	(660)
Dividends paid on common stock	(281)	(256)
Proceeds from options exercised	0	12
Net cash provided by financing activities	227	726
Net decrease in cash	(582)	(1,444)
Cash, beginning of year	1,946	3,390
Cash, end of year	1,364	1,946
Supplemental Cash Flow Information:
Non-cash transaction - dividends payable	282	281
Non-cash transaction - right of use asset and lease liability upon lease standard adoption	414	0
Cash payments for interest	179	176
Cash payments for income taxes	$ 73	$ 49