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Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Operating activities:    
Net income $ 2,120 $ 2,152
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation and amortization 647 634
Fair market value gain on digital assets (345)
Gain on sale of assets (1) (7)
Stock-based compensation expense 34 78
Deferred tax benefit 90 30
Bad debt expense 48 44
Changes in operating assets and liabilities, net of effect from acquisitions:    
Accounts receivable 254
Inventory 107 (221)
Prepaid expenses and other assets (358) 155
Accounts payable (99) (73)
Accrued expenses and other current liabilities (4) (154)
Deferred revenue 263 207
Right of use assets and liabilities, net (26) (23)
Net cash provided by operating activities 2,730 2,822
Investing activities:    
Investment in Blue Trace (200)
Acquisition of Upcycle Certification Program (300)
Purchases of property, equipment and software development costs (159) (148)
Net cash used in investing activities (159) (648)
Financing activities:    
Repayments of finance lease obligations (14) (13)
Proceed from stock option exercise 84 68
Private purchase of common shares (1,027)
Stock repurchase under Stock Buyback Plan (2,243) (3,956)
Net cash used in financing activities (3,200) (3,901)
Net change in cash (629) (1,727)
Cash at beginning of period 2,641 4,368
Cash at end of period $ 2,012 $ 2,641