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Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Cash flows from operating activities:    
Net income $ 13,859 $ 9,025
Adjustments to reconcile net income to operating cash flow:    
Depreciation and amortization 3,980 3,386
Stock-based compensation 1,947 2,446
Non-cash interest expense 19 17
(Gain) loss on sale of equipment (115) 8
Gain on sale of investments (3,407) 0
Fair value loss on investment 96 0
Deferred income taxes (270) 61
(Increase) decrease in operating assets:    
Accounts receivable (1,219) (1,550)
Inventories (3,212) 426
Prepaid expenses and other current assets 151 (125)
Refundable income taxes 306 (631)
Increase (decrease) in operating liabilities:    
Accounts payable 238 156
Accrued expenses (1,643) 217
Accrued income taxes 218 (474)
Net cash provided by operating activities 10,948 12,962
Cash flows from investing activities:    
Purchases of property and equipment (27,361) (6,697)
Proceeds from sale of equipment 115 15
Proceeds from sale of investments 5,206 0
Net cash used in investing activities (22,040) (6,682)
Cash flows from financing activities:    
Repayment of note payable 0 (2,750)
Payment of deferred financing costs (65) 0
Net cash used in financing activities (65) (2,750)
Net (decrease) increase in cash and cash equivalents (11,157) 3,530
Cash and cash equivalents at the beginning of the period 16,728 13,198
Cash and cash equivalents at the end of the period 5,571 16,728
Supplemental cash flow information:    
Cash paid for income taxes, net of (refunds) 5,588 5,987
Cash paid for interest 58 98
Non-cash investing activities    
Accrued purchase of property and equipment 774 407
Right-of-use assets obtained in exchange for lease obligations $ 426 $ 0