CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Current assets:
Cash	$ 3,745	$ 3,523
Accounts receivable, net of allowance of $84 and $50, respectively	4,650	4,454
Inventory	187	0
Contract assets	189	814
Prepaid expenses and other current assets	151	156
Total current assets	8,922	8,947
Property, plant and equipment, net	2,604	7,964
Intangibles, net	44	50
Right-of-use operating lease assets	3,174	4,334
Other assets	195	256
Total assets	14,939	21,551
Current liabilities:
Accounts payable and accrued liabilities	1,988	2,204
Contract liabilities	730	623
Current portion of PPP loan payable	863	0
Current lease liabilities	1,261	1,181
Total current liabilities	4,842	4,008
PPP loan payable	248	0
Operating lease liability, long-term	1,951	3,180
Total liabilities	7,041	7,188
Stockholders' equity:
Common stock, $0.001 par value, 24,500,000 shares authorized and 15,906,010 issued	16	16
Additional paid-in capital	73,638	73,521
Treasury stock, 3,367,145 and 2,620,830 shares, respectively, at cost	(2,809)	(2,284)
Accumulated deficit	(62,947)	(56,890)
Total stockholders' equity	7,898	14,363
Total liabilities and stockholders' equity	$ 14,939	$ 21,551