Consolidated Condensed Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Current assets:
Cash	$ 539	$ 373
Restricted cash	646	644
Accounts receivable, less allowance for doubtful accounts of $577 at June 30, 2018 and $332 at December 31, 2017	10,067	9,052
Inventories	15,644	13,708
Contract assets	6,032	2,979
Other current assets	1,760	1,544
Total current assets	34,688	28,300
Machinery and equipment	36,684	40,124
Less: Accumulated depreciation	27,531	32,949
Net machinery and equipment	9,153	7,175
Goodwill	10,808	10,808
Intangible assets, net	2,662	2,740
Investment in partnerships	1,865	1,616
Other assets, net	3,799	3,835
Total assets	62,975	54,474
Current liabilities:
Current maturities of long-term debt	2,072	2,040
Accounts payable	13,173	10,423
Accrued salaries, wages and commissions	3,497	3,113
Other accrued liabilities	3,552	3,739
Total current liabilities	22,294	19,315
Long-term debt, less current maturities	11,205	9,321
Other postretirement benefit obligations	433	455
Accrued pension liabilities	776	772
Other long-term liabilities	3,200	3,172
Total liabilities	37,908	33,035
Commitments and contingencies (note 14)
Shareholders' equity:
Common stock, $1.00 par value per share; 20,000 shares authorized; 7,037 and 6,900 shares issued and outstanding at June 30, 2018 and December 31, 2017, respectively	7,037	6,900
Additional paid-in capital	22,489	21,581
Accumulated deficit	(3,281)	(6,056)
Accumulated other comprehensive loss	(899)	(733)
Total shareholders' equity	25,346	21,692
Non-controlling interest	(279)	(253)
Total equity	25,067	21,439
Total liabilities and equity	$ 62,975	$ 54,474