Consolidated Condensed Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Current assets:
Cash	$ 381	$ 373
Restricted cash	675	644
Accounts receivable, less allowance for doubtful accounts of $483 at March 31, 2018 and $332 at December 31, 2017	11,249	9,052
Inventories	14,862	13,708
Contract assets	4,766	2,979
Other current assets	1,380	1,544
Total current assets	33,313	28,300
Machinery and equipment	34,636	40,124
Less: Accumulated depreciation	27,089	32,949
Net machinery and equipment	7,547	7,175
Goodwill	10,808	10,808
Intangible assets, net	2,701	2,740
Investment in partnerships	1,931	1,616
Other assets, net	3,702	3,835
Total assets	60,002	54,474
Current liabilities:
Current maturities of long-term debt	2,063	2,040
Accounts payable	12,966	10,423
Accrued salaries, wages and commissions	2,503	3,113
Other accrued liabilities	4,286	3,739
Total current liabilities	21,818	19,315
Long-term debt, less current maturities	10,948	9,321
Other postretirement benefit obligations	444	455
Accrued pension liabilities	795	772
Other long-term liabilities	3,114	3,172
Total liabilities	37,119	33,035
Commitments and contingencies
Shareholders' equity:
Preferred stock, $1.00 par value, authorized 1,000 shares; none issued and outstanding
Common stock, $1.00 par value per share; 20,000 shares authorized; 6,944 and 6,900 shares issued and outstanding at March 31, 2018 and December 31, 2017, respectively	6,944	6,900
Additional paid-in capital	22,138	21,581
Accumulated deficit	(5,287)	(6,056)
Accumulated other comprehensive loss	(647)	(733)
Total shareholders' equity	23,148	21,692
Non-controlling interest	(265)	(253)
Total equity	22,883	21,439
Total liabilities and equity	$ 60,002	$ 54,474