CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Current assets:
Cash	$ 3,676	$ 3,745
Accounts receivable	5,929	4,650
Employee retention tax credit receivable	650	0
Inventory	254	187
Contract assets	352	189
Prepaid expenses and other current assets	103	151
Total current assets	10,964	8,922
Property, plant and equipment, net	1,727	2,604
Intangibles, net	38	44
Right-of-use operating lease assets	1,861	3,174
Other assets	136	195
Total assets	14,726	14,939
Current liabilities:
Accounts payable and accrued expenses	2,310	1,988
Contract liabilities	250	730
Current portion of PPP loan payable	0	863
Current lease liabilities	1,306	1,261
Total current liabilities	3,866	4,842
PPP loan payable	0	248
Operating lease liability, long-term	588	1,951
Total liabilities	4,454	7,041
Commitments and contingencies (Note 9)
Stockholders' equity:
Common stock, 24,500,000 shares authorized at $0.001 par value, 15,906,010 issued at December 31, 2021 and December 31, 2020	16	16
Additional paid-in capital	73,686	73,638
Treasury stock, 3,517,145 shares, at cost	(2,809)	(2,809)
Accumulated deficit	(60,621)	(62,947)
Total stockholders' equity	10,272	7,898
Total liabilities and stockholders' equity	$ 14,726	$ 14,939