Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 627	$ 2,289
Restricted short-term investments	50	50
Accounts receivable-trade, net of allowance of $97 and $135 at March 31, 2018 and December 31, 2017	6,395	6,061
Inventories, net of allowance of $77 and $78 at March 31, 2018 and December 31, 2017	1,936	1,327
Cost and estimated earnings in excess of billings on uncompleted contracts	4,271	6,434
Prepaid expenses and other current assets	1,512	534
Total current assets	14,791	16,695
Property, plant and equipment, net	6,784	6,920
Advances to and investments in foreign joint ventures	10,475	10,947
Retainage receivable		785
Intangibles	526	458
Other assets	107	116
Total assets	32,683	35,921
Current liabilities:
Current portion of long-term note payable	360	270
Short-term note payable	97	354
Accounts payable and other accrued expenses	10,808	12,335
Accrued payroll and benefits	1,119	912
Billings in excess of costs and estimated earnings on uncompleted contracts	2,271	1,792
Total current liabilities	14,655	15,663
Long-term note payable, net	5,662	5,524
Deferred compensation	200	213
Deferred income taxes	86
Total liabilities	20,603	21,400
Convertible preferred stock:
Redeemable convertible preferred stock, Series A, net of discount of $547 at March 31, 2018 and $562 at December 31, 2017; $0.001 par value, 1,000,000 shares authorized, issued and outstanding at March 31, 2018 and December 31, 2017	4,453	4,438
Stockholders’ equity:
Common stock; $0.001 par value, 50,000,000 shares authorized, 8,945,404 and 8,850,532 shares issued and 8,751,429 and 8,669,650 shares outstanding at March 31, 2018 and December 31, 2017	9	9
Treasury stock, at cost 193,975 and 180,882 shares at March 31, 2018 and December 31, 2017	(934)	(916)
Additional paid-in capital	14,052	13,811
Accumulated other comprehensive income	776	401
Accumulated Deficit; including accumulated statutory reserves in equity method investments of $2,809 at March 31, 2018 and December 31, 2017	(6,276)	(3,222)
Total stockholders’ equity	7,627	10,083
Total liabilities, convertible preferred stock and stockholders’ equity	$ 32,683	$ 35,921