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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Cash flows from operating activities:    
Net income $ 992,000 $ 5,846,000
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation and amortization 1,271,000 1,589,000
Non-cash operating lease cost 250,000 271,000
Non-cash compensation 44,000  
Bad debt expense 177,000  
Gain on disposal of assets (185,000) (42,000)
Other 11,000 5,000
Change in operating assets and liabilities:    
Increase in accounts receivable (1,259,000) (2,208,000)
Decrease in prepaid expenses and other assets 161,000 2,072,000
Increase in accounts payable 516,000 1,239,000
Decrease in accrued liabilities (107,000) (97,000)
Decrease in operating lease liabilities (272,000) (294,000)
Increase (decrease) in deferred revenue 153,000 (6,511,000)
Net cash provided by operating activities 1,752,000 1,870,000
Cash flows from investing activities:    
Capital expenditures, net of non-cash capital expenditures summarized below   (684,000)
Proceeds from disposal of assets 185,000 162,000
Net cash provided by (used in) investing activities 185,000 (522,000)
Cash flows from financing activities:    
Principal payments on notes payable (440,000) (385,000)
Principal payments on finance leases (191,000) (197,000)
Net cash used in financing activities (631,000) (582,000)
Effect of exchange rate changes on cash and cash equivalents and restricted cash (26,000) (76,000)
Net increase in cash and cash equivalents 1,280,000 690,000
Cash and cash equivalents and restricted cash at beginning of period 1,385,000 15,772,000
Cash and cash equivalents and restricted cash at end of period 2,665,000 16,462,000
Supplemental cash flow information:    
Cash paid for interest 65,000 42,000
Non-cash operating, investing and financing activities:    
Change in accrued purchases of property and equipment   300,000
Finance leases incurred   556,000
Dividend accrual   $ 9,860,000
Financed insurance premiums $ 1,746,000