CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
ASSETS
Cash (including a compensating balance of $3,900) (Note 6)	$ 5,658	$ 5,312
Accounts receivable, net of allowance for doubtful accounts of $0 and $498, respectively	8,064	6,488
Inventory, net of reserve for obsolescence of $0 and $205, respectively	3,241	3,127
Costs and estimated earnings in excess of billings on uncompleted contracts	5,946	6,808
Prepaid expenses and other current assets	177	280
Total current assets	23,086	22,015
Property, plant and equipment, net	11,538	11,732
Intangibles, net	80	82
Other assets	870	891
Total assets	35,574	34,720
LIABILITIES AND STOCKHOLDERS' EQUITY
Accounts payable and accrued liabilities	3,692	4,139
Billings in excess of costs and estimated earnings on uncompleted contracts	634	0
Current portion of long-term debt	6,453	5,615
Total current liabilities	10,779	9,754
Total liabilities	10,779	9,754
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, 15,131 shares issued and outstanding	15	15
Additional paid-in capital	72,658	72,532
Accumulated deficit	(47,878)	(47,581)
Total stockholders' equity	24,795	24,966
Total liabilities and stockholders' equity	$ 35,574	$ 34,720