CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Cash and cash equivalents	$ 24,022	$ 31,584
Short-term investments	19,946	28,343
Accounts receivable, net of allowance of bad debt	559	758
Prepaid expenses and other current assets	4,709	3,612
Property and equipment, net	84,168	87,982
Other non-current assets	1,033	1,069
Accrued expenses	16,210	13,555
Income taxes payable	0	65
Long-term debt, current portion	21,100	1,179
Other current liabilities	139	968
Debt discount non current	70	141
Other non-current liabilities	$ 2,742	$ 2,736
Preferred stock, par value (in dollars per share)	$ 0.001	$ 0.001
Preferred stock, shares authorized (in shares)	10,000,000	10,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	100,000,000	100,000,000
Common stock, shares issued (in shares)	20,120,505	20,059,505
Common stock, shares outstanding (in shares)	20,097,505	20,036,505
Treasury stock, par value (in dollars per share)	$ 0.001	$ 0.001
Treasury stock, shares (in shares)	23,000	23,000
VIE, Primary Beneficiary
Cash and cash equivalents	$ 1,437	$ 1,703
Short-term investments	7,935	11,128
Prepaid expenses and other current assets	159	27
Property and equipment, net	42,061	42,972
Other non-current assets	54	34
Accounts payable	97	16
Accrued expenses	400	489
Income taxes payable	0	3
Long-term debt, current portion	21,100	1,179
Other current liabilities	48	916
Debt discount non current	70	141
Long-term debt, net of current portion	23,031	47,279
Other non-current liabilities	$ 1,233	$ 1,198