Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Reconciliation of net income to net cash provided by operating activities
Net income	$ 1,687	$ 2,684
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation and amortization	1,247	926
Allowance for doubtful accounts	6	(139)
Gain on sale of fixed assets	(126)	(51)
Stock compensation	243	411
Deferred taxes	137	526
(Increase) decrease in
Accounts receivable - billed	(3,320)	(1,640)
Accounts receivable - unbilled	(1,063)	20
Inventories	(45)	(937)
Refundable income taxes	450	(1,107)
Prepaid expenses and other assets	(114)	(285)
Increase (decrease) in
Accounts payable - trade	1,153	969
Accrued expenses and other liabilities	22	294
Deferred revenue	539	420
Accrued compensation	326	347
Deferred buy-back lease obligation	6,592	0
Customer deposits	738	488
Net cash provided by operating activities	8,472	2,926
Cash Flows From Investing Activities
Purchases of investment securities available-for-sale	(33)	(32)
Purchases of property and equipment	(5,234)	(2,741)
Deferred buy-back lease asset	(5,507)	0
Proceeds from sale of fixed assets	132	46
Net cash absorbed by investing activities	(10,642)	(2,727)
Cash Flows From Financing Activities
Proceeds from the line-of-credit construction draw	1,000	0
Proceeds from long-term borrowings	630	184
Repayments of long-term borrowings	(660)	(584)
Dividends paid on common stock	(256)	(49)
Proceeds from options exercised	12	117
Net cash provided by or (absorbed by) financing activities	726	(332)
Net decrease in cash	(1,444)	(133)
Cash, beginning of year	3,390	3,523
Cash, end of year	1,946	3,390
Cash payments for interest	176	184
Cash payments for income taxes	$ 0	$ 1,292