Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Cash Flows From Operating Activities
Net income (loss)	$ 604	$ 270
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities
Depreciation and amortization	873	504
Gain on sale of assets	(12)	(55)
Allowance for doubtful accounts	56	3
Stock compensation	154	186
Deferred taxes	(90)	(3)
(Increase) decrease in
Accounts receivable - billed	1,141	(2,298)
Accounts receivable - unbilled	1,046	(1,021)
Inventories	557	424
Prepaid expenses and other assets	(41)	45
Refundable income taxes	697	33
Increase (decrease) in
Accounts payable - trade	(1,653)	(73)
Accrued expenses and other liabilities	(426)	0
Deferred revenue	345	54
Accrued compensation	(734)	(543)
Accrued income taxes payable	0	80
Deferred buy-back lease obligation	36	3,733
Customer deposits	(417)	308
Net cash provided by (used in) operating activities	2,136	1,647
Cash Flows From Investing Activities
Purchases of investment securities available-for-sale	(16)	(16)
Purchases of property and equipment	(1,996)	(1,057)
Deferred buy-back lease asset	(361)	(2,986)
Proceeds from sale of fixed assets	7	67
Net cash used in investing activities	(2,366)	(3,992)
Cash Flows From Financing Activities
Proceeds from the line-of-credit construction draw	500	0
Proceeds from long-term borrowings	49	350
Repayments of long-term borrowings	(343)	(312)
Dividends paid on common stock	(281)	(256)
Proceeds from options exercised	0	12
Net cash used in financing activities	(75)	(206)
Net decrease in cash	(305)	(2,551)
Cash, beginning of period	1,946	3,390
Cash, end of period	$ 1,641	$ 839