Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Current assets:
Cash and cash equivalents	$ 4,944	$ 4,958
Accounts receivable	81	76
Inventory, current	228	245
Prepaid expenses and other current assets	497	478
Total current assets	5,750	5,757
Fixed assets, net	897	992
Inventory, non-current	251	251
Right-of-use assets	155	210
Other non-current assets	13	13
Total assets	7,066	7,223
Current liabilities:
Accounts payable and accrued expenses	1,495	1,842
Operating lease liabilities - current	116	169
Other current liabilities	66	226
Current portion of long-term debt, net of unamortized debt discount of $91 and $108, respectively	1,632	1,033
Total current liabilities	3,309	3,270
Long-term debt, net of unamortized debt discount of $5 and $16, respectively	669	1,239
Operating lease liabilities - non-current	21	27
Total liabilities	3,999	4,536
Commitments and contingent liabilities (Note 9)
Shareholders’ equity
Common stock $0.0001 par value; 115,000,000 shares authorized; 5,210,876 and 1,547,042 shares issued and outstanding as of March 31, 2024 and December 31, 2023, respectively	1
Additional paid-in capital	159,397	156,905
Accumulated deficit	(156,331)	(154,218)
Total shareholders’ equity	3,067	2,687
Total liabilities and shareholders’ equity	$ 7,066	$ 7,223