Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Cash Flows From Operating Activities
Net income (loss)	$ 403	$ 628
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities
Depreciation and amortization	1,180	873
Gain on sale of assets	(66)	(12)
Unrealized (gain) loss	(3)	(24)
Allowance for doubtful accounts	68	56
Stock compensation	0	154
Deferred taxes	3	(90)
(Increase) decrease in
Accounts receivable - billed	1,898	1,141
Accounts receivable - unbilled	(192)	1,046
Inventories	134	557
Prepaid expenses and other assets	(101)	(41)
Refundable income taxes	136	697
Increase (decrease) in
Accounts payable - trade	(62)	(1,653)
Accrued expenses and other liabilities	186	(426)
Deferred revenue	(6)	345
Accrued compensation	(190)	(734)
Deferred buy-back lease obligation	(555)	36
Customer deposits	(251)	(417)
Net cash provided by (used in) operating activities	2,582	2,136
Cash Flows From Investing Activities
Purchases of investment securities available-for-sale	(15)	(16)
Purchases of property and equipment	(2,326)	(1,996)
Deferred buy-back lease asset	0	(361)
Proceeds from sale of fixed assets	71	7
Net cash provided by (used in) investing activities	(2,270)	(2,366)
Cash Flows From Financing Activities
Proceeds from the line-of-credit construction draw	0	500
Proceeds from long-term borrowings	5,426	49
Repayments of long-term borrowings	(2,416)	(343)
Dividends paid on common stock	(282)	(281)
Net cash provided by (used in) financing activities	2,728	(75)
Net increase (decrease) in cash	3,040	(305)
Cash, beginning of period	1,364	1,946
Cash, end of period	4,404	1,641
Supplemental Cash Flow information:
Non-cash transaction - right of use asset and lease liability upon lease standard adoption	0	414
Cash payments for interest	113	85
Cash payments for income taxes	$ 1	$ 35