CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Current assets:
Cash	$ 3,439	$ 3,676
Accounts receivable, net	4,716	5,929
Employee retention tax credit receivable	650	650
Inventory	267	254
Contract assets	7	352
Prepaid expenses and other current assets	250	103
Total current assets	9,329	10,964
Property, plant and equipment, net	2,267	1,727
Intangibles, net	43	38
Right-of-use operating lease assets	1,217	1,861
Other assets	148	136
Total assets	13,004	14,726
Current liabilities:
Accounts payable and accrued expenses	1,725	2,310
Contract liabilities	106	250
Current lease liabilities	1,222	1,306
Total current liabilities	3,053	3,866
Operating lease liability, long-term	21	588
Total liabilities	3,074	4,454
Commitments and contingencies (Note 8)
Stockholders' equity:
Common stock, 24,500,000 shares authorized at $0.001 par value, 15,906,010 issued at June 30, 2022 and December 31, 2021	16	16
Additional paid-in capital	73,757	73,686
Treasury stock, 4,017,808 shares at June 30, 2022 and 3,517,145 shares at December 31, 2021, at cost	(3,135)	(2,809)
Accumulated deficit	(60,708)	(60,621)
Total stockholders' equity	9,930	10,272
Total liabilities and stockholders' equity	$ 13,004	$ 14,726