Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 3,743	$ 19,143
Accounts receivable, net	1,665	1,533
Income taxes receivable	4,675
Inventory, net	2,693	966
Prepaid expenses and other current assets	1,576	2,283
Total current assets	14,352	23,925
Property and equipment, net	12,047	12,447
Right of use asset	888	949
Other non-current assets	2,012	2,012
Total assets	29,299	39,333
Current liabilities:
Long-term debt, current portion	12,252	16,833
Accounts payable	9,537	8,707
Accrued expenses	3,828	3,563
Lease liability, current portion	231	175
Total current liabilities	25,848	29,278
Lease liabilities, long-term	708	784
Total liabilities	26,556	30,062
Commitments and contingencies (Note 10)
Stockholders' equity
Preferred stock, $.0001 par value, 10,000,000 shares authorized, 4,850 issued and 2,425 outstanding at March 31, 2022 and no shares issued and outstanding at December 31, 2021	887
Additional paid-in capital	400,742	396,388
Accumulated deficit	(398,886)	(387,117)
Total stockholders' equity	2,743	9,271
Total liabilities and stockholders' equity	$ 29,299	$ 39,333