CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Cash and cash equivalents	$ 13,144	$ 23,076
Short-term investments	33,515	26,343
Allowance for bad debt	342	392
Prepaid expenses and other current assets	4,492	6,219
Property and equipment, net	93,853	95,226
Other non-current assets	1,232	619
Accrued expenses	11,318	10,576
Customer deposits	725	951
Long-term debt, current portion	1,139	1,122
Other current liabilities	3,875	3,200
Long-term debt, net of current portion	$ 187	$ 203
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)	19,995,032	19,988,482
Common stock, shares outstanding (in shares)	19,972,032	19,965,482
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	$ 4,327	$ 13,566
Short-term investments	7,038	0
Prepaid expenses and other current assets	78	82
Property and equipment, net	43,882	44,185
Other non-current assets	67	53
Accounts payable	68	63
Accrued expenses	171	591
Customer deposits	0	116
Long-term debt, current portion	1,139	1,122
Other current liabilities	2,186	1,302
Long-term debt, net of current portion	48,116	48,396
Debt discount	$ 187	$ 203