Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Current assets:
Cash and cash equivalents	$ 6,208	$ 15,689
Accounts receivable, net	1,588	1,420
Inventories	4,670	4,819
Prepaid expenses and other current assets	3,094	3,261
Total current assets	15,560	25,189
Property and equipment, net	1,611	1,658
Operating lease right-of-use assets	7,031	7,395
Restricted cash	551	551
Other assets	2	4
Total assets	24,755	34,797
Current liabilities:
Accounts payable	1,887	1,527
Accrued expenses and other current liabilities	4,231	4,905
Operating lease liability	1,651	1,616
Warrant liabilities	207	235
Deferred revenue	185	224
Total current liabilities	56,256	56,152
Operating lease liabilities, net of current portion	6,180	6,598
Deferred revenue, net of current portion	92	83
Total liabilities	62,528	62,833
Commitments and contingencies (see Note 14)
Stockholders’ deficit
Preferred stock, $0.001 par value; 10,000,000 shares authorized: Series B Convertible Preferred Stock, 10,875 shares designated on March 31, 2024,10,875 and 93,297 shares issued and outstanding to related party on March 31, 2024 and December 31, 2023, respectively
Common stock, $0.001 par value; 400,000,000 shares authorized; 5,512,332 and 4,058,381 shares issued and outstanding on March 31,2024 and December 31, 2023, respectively	6	4
Additional paid-in capital	560,051	556,256
Accumulated deficit	(597,830)	(584,296)
Total stockholders’ deficit	(37,773)	(28,036)
Total liabilities and stockholders' deficit	24,755	34,797
Related Party [Member]
Current liabilities:
Notes payable	41,666	41,284
Accrued final payment fee on Term Loan	4,767	4,807
Derivative liability related to Term Loan	$ 1,662	$ 1,554