Consolidated Condensed Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Current assets:
Cash, cash equivalents and restricted cash	$ 13,190	$ 8,047
Short-term investments	16,008	38,093
Accounts receivable, less allowance for doubtful accounts of $368 at March 31,2019 and $807 at December 31, 2018	10,493	11,479
Inventories	19,134	18,981
Contract assets	6,320	5,624
Other current assets	1,541	2,320
Total current assets	66,686	84,544
Machinery and equipment	38,202	37,161
Less: Accumulated depreciation	25,941	25,429
Net machinery and equipment	12,261	11,732
Goodwill	10,808	10,808
Intangible assets, net	2,546	2,585
Operating lease right of use asset	5,518
Investment in partnerships	1,324	2,091
Long-term investments	15,228
Other assets, net	6,525	3,488
Total assets	120,896	115,248
Current liabilities:
Current financing leases	104
Current operating leases	1,700
Accounts payable	12,237	13,191
Accrued salaries, wages and commissions	2,572	4,409
Other accrued liabilities	4,692	4,047
Total current liabilities	21,305	21,647
Noncurrent financing leases	95
Noncurrent operating leases	4,030
Other postretirement benefit obligations	366	377
Accrued pension liabilities	733	706
Other long-term liabilities	1,306	544
Total liabilities	27,835	23,274
Commitments and contingencies
Shareholders' equity:
Common stock, $1.00 par value per share; 20,000 shares authorized; 8,714 and 8,664 shares issued and outstanding at March 31, 2019 and December 31, 2018, respectively	8,714	8,664
Additional paid-in capital	85,131	84,999
Retained earnings (accumulated deficit)	266	(509)
Accumulated other comprehensive loss	(797)	(927)
Total shareholders' equity	93,314	92,227
Non-controlling interest	(253)	(253)
Total equity	93,061	91,974
Total liabilities and equity	$ 120,896	$ 115,248