CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Current assets:
Cash	$ 2,015	$ 3,939
Short term investment (certificate of deposit)	1,035	1,017
Accounts receivable, net of allowance of $10 and $10, respectively	4,388	4,142
Contract assets	1,931	925
Prepaid expenses and other current assets	621	302
Total current assets	9,990	10,325
Property, plant and equipment, net	9,691	12,352
Intangibles, net	56	63
Other assets	383	1,230
Total assets	20,120	23,970
Current liabilities:
Accounts payable and accrued liabilities	1,982	1,511
Contract liabilities	973	612
Current portion of long-term debt	9	0
Total current liabilities	2,964	2,123
Long-term debt (Auto loan)	47	0
Total long term liabilities	47	0
Total liabilities	3,011	2,123
Stockholders' equity:
Common stock, $0.001 par value, 24,500,000 shares authorized, 15,706,010 and 15,438,660 shares issued, respectively	16	15
Additional paid-in capital	73,271	73,246
Treasury stock 2,027,217 and 2,002,417 shares, respectively, at cost	(2,062)	(2,040)
Accumulated deficit	(54,116)	(49,374)
Total stockholders' equity	17,109	21,847
Total liabilities and stockholders' equity	$ 20,120	$ 23,970