Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 13,020	$ 8,608
Restricted cash	647	672
Short-term investment securities	20,044	19,793
Accounts receivable, net of $71 and $210 of reserves, respectively	9,676	10,115
Inventories	22,231	19,513
Contract assets	11,464	9,107
Other current assets	2,175	1,466
Total current assets	79,257	69,274
Property, plant and equipment	47,722	45,661
Less: Accumulated depreciation	33,838	31,484
Net property, plant and equipment	13,884	14,177
Goodwill	13,873	13,714
Intangible assets, net	9,515	10,785
Operating lease right-of-use assets, net	5,236	6,701
Investment in partnerships	538	570
Long-term investment securities	0	5,085
Other assets, net	1,110	990
Total assets	123,413	121,296
Current liabilities:
Current financing leases	5	21
Current operating leases	1,910	2,156
Accounts payable	10,321	8,670
Accrued salaries, wages and commissions	5,054	3,581
Other accrued liabilities	4,230	4,235
Total current liabilities	21,520	18,663
Noncurrent operating leases	3,446	4,726
Other postretirement benefit obligations	352	385
Accrued pension liabilities	776	907
Deferred tax liabilities, net	1,028	1,018
Other long-term liabilities	3,414	4,398
Total liabilities	30,536	30,097
Commitments and contingencies (Note 11)
Shareholders’ equity:
Common stock, $1.00 par value per share; 20,000 shares authorized; 9,114 and 8,951 shares issued and outstanding, respectively	9,114	8,951
Additional paid-in capital	91,027	89,702
Accumulated deficit	(6,938)	(6,810)
Accumulated other comprehensive loss	(419)	(679)
Total shareholders' equity	92,784	91,164
Non-controlling interest	93	35
Total equity	92,877	91,199
Total liabilities and equity	$ 123,413	$ 121,296