Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Cash Flows From Operating Activities
Net income (loss)	$ 331	$ (422)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities
Depreciation and amortization	426	248
Gain on sale of assets	(2)	(24)
Allowance for doubtful accounts	15	71
Stock compensation	84	117
Deferred taxes	3	(142)
(Increase) decrease in
Accounts receivable - billed	2,727	(937)
Accounts receivable - unbilled	750	(300)
Inventories	514	515
Prepaid expenses and other assets	515	(31)
Refundable income taxes	92	31
Increase (decrease) in
Accounts payable - trade	(1,482)	(325)
Accrued expenses and other liabilities	(25)	107
Deferred revenue	182	101
Accrued compensation	(815)	(610)
Deferred buy-back lease obligation	258	1,344
Customer deposits	(1,113)	(170)
Net cash provided by (used in) operating activities	2,459	(427)
Cash Flows From Investing Activities
Purchases of investment securities available-for-sale	(8)	(8)
Purchases of property and equipment	(1,049)	(860)
Deferred buy-back lease asset	(358)	(1,076)
Proceeds from sale of fixed assets	2	38
Net cash used in investing activities	(1,413)	(1,906)
Cash Flows From Financing Activities
Proceeds from the line-of-credit construction draw	500	0
Proceeds from long-term borrowings	0	350
Repayments of long-term borrowings	(178)	(151)
Dividends paid on common stock	(281)	(256)
Proceeds from options exercised	0	6
Net cash provided by (used in) financing activities	41	(51)
Net increase (decrease) in cash	1,087	(2,384)
Cash, beginning of year	1,946	3,390
Cash, end of year	$ 3,033	$ 1,006