Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 13,027	$ 19,143
Accounts receivable, net	2,087	1,533
Inventory, net	2,340	966
Prepaid expenses and other current assets	1,016	2,283
Total current assets	18,470	23,925
Property and equipment, net	11,524	12,447
Right of use asset	825	949
Other non-current assets	2,012	2,012
Total assets	32,831	39,333
Current liabilities:
Long-term debt, current portion	12,630	16,833
Accounts payable	12,036	8,707
Accrued expenses	3,877	3,563
Lease liability, current portion	239	175
Total current liabilities	28,782	29,278
Lease liabilities, long-term	630	784
Total liabilities	29,412	30,062
Commitments and contingencies (Note 10)
Stockholders' equity
Common stock, $.0001 par value, 300,000,000 shares authorized, 12,360,157 and 3,034,901 issued and outstanding at June 30, 2022 and December 31, 2021, respectively	1
Additional paid-in capital	414,523	396,388
Accumulated deficit	(411,105)	(387,117)
Total stockholders' equity	3,419	9,271
Total liabilities and stockholders' equity	$ 32,831	$ 39,333