CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Current assets:
Cash	$ 2,186	$ 657
Trade accounts receivable, less allowance for doubtful accounts of $139 for December 31, 2022, and $60 for 2021	4,734	3,937
Inventories, net	8,839	6,095
Prepaid expenses and other current assets	866	910
Total current assets	16,625	11,599
Equipment and leasehold improvements, net	7,949	4,712
Operating leases, right of use	8,978	12,075
Other assets, net	6	8
Total assets	33,558	28,394
Current liabilities:
Line of credit, related party	7,282	1,351
Current portion of finance lease obligations		105
Current portion of operating lease obligations	0	589
Accounts payable	6,363	3,566
Current portion of deferred revenue	2,167	783
Accrued expenses	1,023	946
Total current liabilities	16,835	7,340
Long-term portion of finance lease obligations		6
Long-term portion of operating lease obligations	9,823	11,700
Long-term debt, related party	1,000	1,000
Long-term portion of deferred revenue	21	661
Asset retirement obligations	230	222
Total long-term liabilities	11,074	13,589
Contingent liabilities
Stockholders’ equity:
Preferred stock, $.01 par value, 24,088 shares authorized, and no shares issued and outstanding
Common stock, $.01 par value, 60,000,000 and 55,000,000 shares authorized; 49,320,680 and 48,893,573 shares issued and outstanding on December 31, 2022 and December 31, 2021, respectively	493	489
Additional paid-in capital	105,226	104,423
Accumulated deficit	(100,070)	(97,447)
Total stockholders’ equity	5,649	7,465
Total liabilities and stockholders’ equity	$ 33,558	$ 28,394