CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 3,697	$ 3,939
Short term investment (certificate of deposit)	1,032	1,017
Accounts receivable, net of allowance of $10	3,001	4,142
Contract assets	1,174	925
Prepaid expenses and other current assets	122	302
Total current assets	9,026	10,325
Property, plant and equipment, net	12,235	12,352
Intangibles, net	58	63
Other assets	1,116	1,230
Total assets	22,435	23,970
Current liabilities:
Accounts payable and accrued liabilities	1,212	1,511
Contract liabilities	508	612
Current portion of long-term debt	9	0
Total current liabilities	1,729	2,123
Long-term debt	51	0
Total liabilities	1,780	2,123
Commitments and contingencies (Note 8)
Stockholders' equity:
Preferred stock, $0.001 par value, 10,000,000 shares authorized, 0 shares issued and outstanding	0	0
Common stock, $0.001 par value, 24,500,000 shares authorized, 15,738,660 shares issued	15	15
Treasury stock	(2,040)	(2,040)
Additional paid-in capital	73,261	73,246
Accumulated deficit	(50,581)	(49,374)
Total stockholders' equity	20,655	21,847
Total liabilities and stockholders' equity	$ 22,435	$ 23,970