CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Current assets
Cash and cash equivalents	$ 2,904	$ 9,725
Accounts receivable, net of expected credit losses of $240 and $160, respectively	8,563	10,672
Inventories, net	23,295	22,968
Prepaid expenses and other current assets	2,259	3,058
Total current assets	37,021	46,423
Property and equipment, net	23,592	23,703
Operating lease right-of-use assets	2,911	3,372
Restricted cash	1,109	1,109
Goodwill	561	565
Deferred income tax assets	56	57
Other long-term assets	2,677	2,388
Total assets	67,927	77,617
Current liabilities
Accounts payable	4,381	5,053
Contract liabilities	1,258	1,237
Accrued expenses and other current liabilities	22,913	12,805
Current portion of loans payable, net	118,406
Total current liabilities	146,958	19,095
Long-term loans payable, net		107,059
Other long-term liabilities	2,288	6,797
Total liabilities	149,246	132,951
Commitments and contingencies (Note 9)
Stockholders' deficit
Preferred stock ($0.001 par value) 25,000,000 shares authorized; no shares issued and outstanding as of June 30, 2024 and December 31, 2023
Common stock ($0.001 par value) 21,875,000 shares authorized as of June 30, 2024 and December 31, 2023, 6,241,958 and 6,165,806 shares issued and outstanding as of June 30, 2024 and December 31, 2023, respectively	6	6
Additional paid-in capital	496,083	492,764
Accumulated other comprehensive (loss) income	(106)	91
Accumulated deficit	(577,302)	(548,195)
Total stockholders' deficit	(81,319)	(55,334)
Total liabilities and stockholders' deficit	$ 67,927	$ 77,617