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Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Operating activities:    
Net income $ 1,994 $ 2,961
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation and amortization 765 799
Impairment of digital assets 62
Gain on sale of assets (12) (95)
Stock-based compensation expense 154 291
Deferred tax benefit (59) (21)
Bad debt expense 26
Forgiveness of note payable from Paycheck Protection Program (1,037)
Changes in operating assets and liabilities, net of effect from acquisitions:    
Accounts receivable (20) 330
Inventory (121) (767)
Prepaid expenses and other assets (138) 267
Accounts payable 193 (202)
Accrued expenses and other current liabilities 59 108
Deferred revenue (235) 381
Right of use assets and liabilities, net (14) 5
Net cash provided by operating activities 2,654 3,020
Investing activities:    
Purchase of digital assets (178)
Proceeds from sale of assets 210
Purchases of property, equipment and software development costs (89) (213)
Net cash used in investing activities (267) (3)
Financing activities:    
Repayments of finance lease obligations (13) (10)
Proceed from stock option exercise 36 52
Dividends paid to shareholders (914)
Stock repurchase under Stock Buyback Plan (3,456) (1,105)
Net cash used in financing activities (3,433) (1,977)
Net change in cash (1,046) 1,040
Cash at beginning of period 5,414 4,374
Cash at end of period $ 4,368 $ 5,414