CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Current assets:
Cash (including a compensating balance of $3,900 at December 31, 2015) (Note 6)	$ 6,983	$ 4,274
Accounts receivable, net of allowance of $150	6,972	7,849
Inventory	3,117	3,117
Costs and estimated earnings in excess of billings on uncompleted contracts	2,274	1,354
Prepaid expenses and other current assets	284	229
Total current assets	19,630	16,823
Property, plant and equipment, net	8,052	10,762
Intangibles, net	72	75
Other assets	822	878
Total assets	28,576	28,538
Current liabilities:
Accounts payable and accrued liabilities	2,584	2,162
Billings in excess of costs and estimated earnings on uncompleted contracts	3,264	46
Current portion of long-term debt	0	2,747
Total current liabilities	5,848	4,955
Total liabilities	5,848	4,955
Commitments and contingencies (Notes 6 and 10)
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, 15,493,360 and 15,631,714 shares issued, respectively	15	16
Additional paid-in capital	73,132	72,989
Treasury Stock, 4,224 shares at cost	(4)	0
Accumulated deficit	(50,415)	(49,422)
Total stockholders' equity	22,728	23,583
Total liabilities and stockholders' equity	$ 28,576	$ 28,538

Sum of the carrying values as of the balance sheet date of obligations incurred through that date and due within one year (or the operating cycle, if longer), including liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received, taxes, interest, rent and utilities, accrued salaries and bonuses, payroll taxes and fringe benefits.

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- Definition

Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.