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Consolidated Statements of Cash Flows (Unaudited) - USD ($)
$ in Thousands
 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Operating activities:    
Net income $ 1,352 $ 110
Adjustments to reconcile net loss to net cash provided by operating activities:    
Depreciation and amortization 401 478
Gain on sale of assets (9)
Stock-based compensation expense 54 55
Deferred tax expense 3 29
Bad debt expense 40
Forgiveness of note payable from Paycheck Protection Program (1,037)
Changes in operating assets and liabilities, net of effect from acquisitions:    
Accounts receivable 477 745
Short-term investments (3)
Inventory (885)
Prepaid expenses and other assets 106 99
Accounts payable 73 (243)
Accrued expenses and other current liabilities 519 66
Deferred revenue 521 409
Right of use assets and liabilities, net 5 3
Net cash provided by operating activities 1,620 1,748
Investing activities:    
Acquisition of Postelsia Holdings, Ltd. (300)
Purchases of property, equipment and software development costs (128) (329)
Net cash used in investing activities (128) (629)
Financing activities:    
Proceeds from long term debt 1,030
Repayments of finance lease obligations (7) (4)
Proceeds from stock option exercise 44 3
Stock repurchase under Stock Buyback Plan (606) (269)
Net cash (used in) / provided by financing activities (569) 760
Net change in cash 923 1,879
Cash at beginning of period 4,374 2,638
Cash at end of period $ 5,297 $ 4,517