Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 5,584	$ 8,608
Restricted cash	645	672
Short-term investment securities	19,420	19,793
Accounts receivable, less provision for doubtful accounts of $69 at December 31, 2021 and $210 at December 31, 2020	8,257	10,115
Inventories	24,456	19,513
Contract assets	11,455	9,107
Other current assets	4,564	1,466
Total current assets	74,381	69,274
Property, plant and equipment	48,208	45,661
Less: Accumulated depreciation	34,371	31,484
Net property, plant and equipment	13,837	14,177
Goodwill	13,873	13,714
Intangible assets	8,999	10,785
Operating lease right-of-use assets, net	5,138	6,701
Investment in partnership	473	570
Long-term investment securities	4,558	5,085
Other assets, net	1,200	990
Total assets	122,459	121,296
Current liabilities:
Current financing leases	4	21
Current operating leases	1,807	2,156
Accounts payable	9,398	8,670
Accrued salaries, wages and commissions	5,185	3,581
Other accrued liabilities	3,818	4,235
Total current liabilities	20,212	18,663
Noncurrent operating leases	3,431	4,726
Pension and postretirement benefit obligations	1,093	1,292
Deferred tax liabilities, net	873	1,018
Other long-term liabilities	3,100	4,398
Total liabilities	28,709	30,097
Commitments and contingencies (Note 20)
Shareholders’ equity:
Common stock, $1.00 par value per share; 20,000 shares authorized; 9,179 and 8,951 shares issued and outstanding at December 31, 2021 and December 31, 2020 respectively	9,179	8,951
Additional paid-in capital	91,785	89,702
Accumulated deficit	(6,916)	(6,810)
Accumulated other comprehensive loss	(393)	(679)
Total shareholders' equity	93,655	91,164
Non-controlling interest	95	35
Total equity	93,750	91,199
Total liabilities and equity	$ 122,459	$ 121,296