CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025
Cash flows from operating activities
Net income	$ 36,790	$ 17,867
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization (including $606 and $607 associated with variable interest entity for the six months ended June 30, 2026 and 2025, respectively)	5,468	5,366
Adjustments to allowance for bad debt	546	(48)
Adjustments to inventory reserve	68	60
Write-off of inventories	690	296
Loss (gain), net, on disposal of property and equipment	60	(300)
Amortization of loan fees (including $31 associated with variable interest entity for both the six months ended June 30, 2026 and 2025)	102	47
Unrealized loss from investment in publicly-traded equity securities	31	2
Stock-based compensation	838	791
Amortization of operating right-of-use assets	5,499	4,898
Government grant income (including ($16) associated with variable interest entity for both the six months ended June 30, 2026 and 2025)	(35)	(35)
(Increase) decrease in operating assets
Accounts receivable (including $4 and $0 associated with variable interest entity for the six months ended June 30, 2026 and 2025, respectively)	(13,352)	(9,601)
Inventories	(8,161)	(18,413)
Prepaid expenses and other current assets (including ($7) and $32 associated with variable interest entity for the six months ended June 30, 2026 and 2025, respectively)	(1,642)	(432)
Other non-current assets (including $31 and $4 associated with variable interest entity for the six months ended June 30, 2026 and 2025, respectively)	(15)	(16)
Increase (decrease) in operating liabilities
Accounts payable (including ($97) and $100 associated with variable interest entity for the six months ended June 30, 2026 and 2025, respectively)	8,174	15,576
Accrued expenses (including ($211) and $173 associated with variable interest entity for the six months ended June 30, 2026 and 2025, respectively)	2,480	673
Related party payable	2,718	4,844
Income taxes payable	5,705	86
Deferred revenue	341	395
Operating lease liabilities	(5,943)	(4,646)
Other liabilities (including ($4) and $67 associated with variable interest entity for the six months ended June 30, 2026 and 2025, respectively)	(17)	66
Net cash provided by operating activities	40,345	17,476
Cash flows from investing activities
Purchases of property and equipment	(621)	(274)
Proceeds from disposal of property and equipment	0	475
Deposits paid for property and equipment	(1,653)	(989)
Purchases of publicly-traded equity securities	(242)	(451)
Proceeds from disposal of publicly-traded equity securities	0	503
Purchases of short-term investments (including $0 and $7,982 associated with variable interest entity for the six months ended June 30, 2026 and 2025, respectively)	15,744	16,300
Redemption of short-term investments (including $0 and $7,678 associated with variable interest entity for the six months ended June 30, 2026 and 2025, respectively)	0	18,200
Net cash (used in) provided by investing activities	(18,260)	1,164
Cash flows from financing activities
Payment of long-term debt (including ($1,232) and ($583) associated with variable interest entity for the six months ended June 30, 2026 and 2025, respectively)	(1,232)	(583)
Payments for lender fees	(111)	(62)
Proceeds from exercise of common stock options	30	195
Repurchase of common stock	(2,003)	0
Dividends paid to shareholders	(17,953)	(18,048)
Payment of Global Wells membership interest tax withholding (including ($382) and ($295) associated with variable interest entity for the six months ended June 30, 2026 and 2025, respectively)	(297)	(298)
Payment of Global Wells noncontrolling membership interest redemption gain tax withholding (including $0 and ($879) associated with variable interest entity for the six months ended June 30, 2026 and 2025, respectively)	0	(879)
Net cash used in financing activities	(21,566)	(19,675)
Net increase (decrease) in cash and cash equivalents	519	(1,035)
Cash and cash equivalents
Beginning of period	37,880	31,584
End of period	38,399	30,549
Supplemental disclosures of non-cash investing and financing activities:
Non-cash excise tax on share repurchases	11	0
Transfers from deposits to property and equipment	1,653	1,025
Non-cash purchases of property and equipment	0	37
Non-cash disposal of property and equipment	0	200
Supplemental disclosures of cash flow information:
Cash paid for income taxes	4,940	5,491
Cash paid for interest	$ 732	$ 948