CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Current assets:
Cash (included in the December 31, 2015 and 2014 balance is a compensating balance of $3,900) (Note 7)	$ 4,274	$ 5,312
Accounts receivable, net of allowance of $150 and $498, respectively	7,849	6,488
Inventory, net of reserve for obsolescence of $0 and $205, respectively	3,117	3,127
Costs and estimated earnings in excess of billings on uncompleted contracts	1,354	6,808
Prepaid expenses and other current assets	229	280
Total current assets	16,823	22,015
Property, plant and equipment, net	10,762	11,732
Intangibles, net	75	82
Other assets	878	891
Total assets	28,538	34,720
Current liabilities:
Accounts payable and accrued liabilities	2,162	4,139
Billings in excess of costs and estimated earnings on uncompleted contracts	46	0
Current portion of long-term debt	2,747	5,615
Total current liabilities	4,955	9,754
Long-term debt, net	0	0
Total liabilities	$ 4,955	$ 9,754
Commitments and contingencies (Note 11)
Stockholders' equity:
Preferred stock, $0.001 par value, 10,000 shares authorized, 0 shares issued and outstanding	$ 0	$ 0
Common stock, $0.001 par value, 24,500 shares authorized, 15,631 and 15,130 shares issued and outstanding, respectively	16	15
Additional paid-in capital	72,989	72,532
Accumulated deficit	(49,422)	(47,581)
Total stockholders' equity	23,583	24,966
Total liabilities and stockholders' equity	$ 28,538	$ 34,720