CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Current assets:
Cash	$ 1,519	$ 2,353
Accounts receivable, net	4,304	2,920
Employee retention tax credit receivable	650	650
Inventory	201	202
Contract assets	347	281
Right-of-use finance lease assets	191	275
Prepaid expenses and other current assets	172	204
Total current assets	7,384	6,885
Property, plant and equipment, net	3,232	3,305
Intangibles, net	74	62
Right-of-use operating lease assets	6,077	6,184
Other assets	175	179
Total assets	16,942	16,615
Current liabilities:
Accounts payable and accrued expenses	1,135	1,516
Contract liabilities	1,124	333
Current operating lease liabilities	1,047	863
Current finance lease liabilities	195	277
Total current liabilities	3,501	2,989
Operating lease liability, long-term	6,406	6,518
Total liabilities	9,907	9,507
Commitments and contingencies (Note 8)
Stockholders' equity:
Common stock, 24,500,000 shares authorized at $0.001 par value, 15,906,010 issued at March 31, 2023 and December 31, 2022	16	16
Additional paid-in capital	73,800	73,776
Treasury stock, 4,017,808 shares at March 31, 2023 and December 31, 2022, at cost	(3,135)	(3,135)
Accumulated deficit	(63,646)	(63,549)
Total stockholders' equity	7,035	7,108
Total liabilities and stockholders' equity	$ 16,942	$ 16,615