Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Cash flows from operating activities:
Net income (loss)	$ 7,570,000	$ 2,665,000
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation and amortization	2,671,000	2,412,000
Gain on forgiveness of PPP loan	(2,692,000)	0
(Gain) loss on sale of investment securities	(6,000)	0
Gain (loss) on sale of fixed assets	311,000	133,000
Unrealized (gain) loss on investment securities available for sale	0	(23,000)
Allowance for doubtful accounts	40,000	(64,000)
Stock compensation	531,000	163,000
Deferred taxes	506,000	(575,000)
(Increase) decrease in
Accounts receivable - billed	255,000	(2,861,000)
Accounts receivable - unbilled	(302,000)	432,000
Inventories	651,000	(48,000)
Prepaid expenses and other assets	(92,000)	(128,000)
Refundable income taxes	411,000	(432,000)
Increase (decrease) in
Accounts payable - trade	205,000	(1,314,000)
Accrued expenses and other liabilities	(219,000)	750,000
Deferred revenue	1,945,000	242,000
Accrued compensation	(282,000)	243,000
Accrued income taxes	1,563,000	470,000
Deferred buy-back lease obligation	1,216,000	1,156,000
Customer deposits	756,000	(508,000)
Net cash provided by (used in) operating activities	9,126,000	7,487,000
Cash flows from investing activities:
Purchases of investment securities available-for-sale	(23,000)	(29,000)
Sale of investment securities available-for-sale	1,247	0
Purchases of property and equipment	(5,367,000)	(2,627,000)
Proceeds from sale of fixed assets	489,000	235,000
Net cash provided by (used in) investing activities	(3,654,000)	(2,421,000)
Cash flows from financing activities:
Proceeds from long-term borrowings	49,000	5,485,000
Repayments of long-term borrowings	(793,000)	(2,869,000)
Dividends paid on common stock	0	(282,000)
Net cash provided by (used in) financing activities	(744,000)	2,334,000
Net increase (decrease) in cash	4,728,000	7,400,000
Cash, beginning of year	8,764,000	1,364,000
Cash, end of year	13,492,000	8,764,000
Supplemental Cash Flow information:
Cash payments for interest	190,000	217,000
Cash payments for income taxes	917,000	22,000
Non-cash transaction - PPP loan forgiveness	$ 2,692,000	$ 0