CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Current assets:
Cash (including a compensating balance of $3,900) (Note 5)	$ 4,656	$ 5,312
Accounts receivable, net of allowance for doubtful accounts of $25 and $498, respectively	11,153	6,488
Inventory, net of reserve for obsolescence of $0 and $205, respectively	3,145	3,127
Costs and estimated earnings in excess of billings on uncompleted contracts	4,661	6,808
Prepaid expenses and other current assets	77	280
Total current assets	23,692	22,015
Property, plant and equipment, net	11,196	11,732
Investment in joint venture	68	0
Intangibles, net	78	82
Other assets	851	891
Total assets	35,885	34,720
Current liabilities:
Accounts payable and accrued liabilities	3,412	4,139
Billings in excess of costs and estimated earnings on uncompleted contracts	436	0
Current portion of long-term debt	4,665	2,942
Total current liabilities	8,513	7,081
Long-term debt, net	2,302	2,673
Total liabilities	$ 10,815	$ 9,754
Commitments and contingencies (Notes 5 and 8)
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, 15,032 and 15,131 shares issued and outstanding, respectively	15	15
Additional paid-in capital	72,727	72,532
Accumulated deficit	(47,672)	(47,581)
Total stockholders' equity	25,070	24,966
Total liabilities and stockholders' equity	$ 35,885	$ 34,720