CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Current assets:
Cash	$ 3,523	$ 2,015
Short term investment (certificate of deposit)	0	1,035
Accounts receivable, net of allowance of $50 and $10, respectively	4,454	4,388
Contract assets	814	1,931
Prepaid expenses and other current assets	156	621
Total current assets	8,947	9,990
Property, plant and equipment, net	7,964	9,691
Intangibles, net	50	56
Right-of-use operating lease assets	4,334	0
Other assets	256	383
Total assets	21,551	20,120
Current liabilities:
Accounts payable and accrued liabilities	2,204	1,982
Contract liabilities	623	973
Current portion of long-term debt	0	9
Current lease liabilities	1,181	0
Total current liabilities	4,008	2,964
Long-term debt (Auto loan)	0	47
Operating lease liability, long-term	3,180	0
Total liabilities	7,188	3,011
Commitments and contingencies (Note 8)	0	0
Stockholders' equity:
Common stock, $0.001 par value, 24,500,000 shares authorized, 15,906,010 and 15,706,010 shares issued, respectively	16	16
Additional paid-in capital	73,521	73,271
Treasury stock, 2,620,830 and 2,027,217 shares, respectively, at cost	(2,284)	(2,062)
Accumulated deficit	(56,890)	(54,116)
Total stockholders' equity	14,363	17,109
Total liabilities and stockholders' equity	$ 21,551	$ 20,120