CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Current assets:
Cash	$ 8,013	$ 8,203
Short term investment (certificate of deposit)	1,005	1,005
Accounts receivable, net of allowance of $10	4,365	5,945
Costs and estimated earnings in excess of billings on uncompleted contracts	1,021	1,077
Prepaid expenses and other current assets	797	864
Total current assets	15,201	17,094
Property, plant and equipment, net	8,015	7,938
Intangibles, net	67	69
Long-term asset - Carousel	3,117	3,117
Other assets	205	211
Total assets	26,605	28,429
Current liabilities:
Accounts payable and accrued liabilities	1,673	1,778
Billings in excess of costs and estimated earnings on uncompleted contracts	1,614	3,349
Total current liabilities	3,287	5,127
Total liabilities	3,287	5,127
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, 15,408,660 shares issued	15	15
Treasury stock, 657,741 and 587,847 shares at cost, respectively	(650)	(567)
Additional paid-in capital	73,147	73,112
Accumulated deficit	(49,194)	(49,258)
Total stockholders' equity	23,318	23,302
Total liabilities and stockholders' equity	$ 26,605	$ 28,429