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Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Cash flows from operating activities    
Net income (loss) $ (422,000) $ 857,000
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:    
Depreciation and amortization 248,000 225,000
Gain on sale of assets (24,000) (13,000)
Allowance for doubtful accounts 71,000 (153,000)
Stock compensation 117,000 151,000
Deferred taxes (142,000) 175,000
(Increase) decrease in    
Accounts receivable - billed (937,000) 1,547,000
Accounts receivable - unbilled (300,000) (92,000)
Inventories 515,000 (1,216,000)
Prepaid expenses and other assets (31,000) (98,000)
Operating lease, net (1,076,000) 0
Refundable income taxes 31,000 251,000
Accounts payable - trade (325,000) (352,000)
Accrued expenses and other liabilities 107,000 (15,000)
Deferred revenue 101,000 (28,000)
Accrued income taxes payable 0 60,000
Accrued compensation (610,000) (260,000)
Deferred buy-back lease 1,344,000 0
Customer deposits (170,000) 472,000
Net cash provided by (used in) operating activities (1,503,000) 1,511,000
Cash flows from investing activities:    
Purchases of investment securities available-for-sale (8,000) (9,000)
Purchases of property and equipment (860,000) (674,000)
Proceeds from sale of fixed assets 38,000 18,000
Net cash used in investing activities (830,000) (665,000)
Cash flows from financing activities:    
Proceeds from long-term borrowings 350,000 183,000
Repayments of long-term borrowings (151,000) (141,000)
Dividends paid on common stock (256,000) (49,000)
Proceeds from options exercised 6,000 62,000
Net cash provided by (used in) financing activities (51,000) 55,000
Net increase (decrease) in cash and cash equivalents (2,384,000) $ 901,000
Cash and cash equivalents    
Beginning of period 3,390,000  
End of period $ 1,006,000