Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 8,608	$ 8,523
Restricted cash	672	639
Short-term investment securities	19,793	23,451
Accounts receivable, less provision for doubtful accounts of $210 at December 31, 2020 and $325 at December 31, 2019	10,115	8,993
Inventories	19,513	16,377
Contract assets	9,107	10,237
Other current assets	1,466	1,975
Current assets of discontinued operations		80
Total current assets	69,274	70,275
Machinery and equipment	45,661	41,073
Less: Accumulated depreciation	31,484	27,522
Net machinery and equipment	14,177	13,551
Goodwill	13,714	9,551
Intangible assets	10,785	5,545
Operating lease right-of-use assets, net	6,701	4,372
Investment in partnerships	570	1,160
Long-term investment securities	5,085	8,629
Other assets, net	990	510
Total assets	121,296	113,593
Current liabilities:
Current financing leases	21	101
Current operating leases	2,156	1,729
Accounts payable	8,670	9,876
Accrued salaries, wages and commissions	3,581	2,274
Other accrued liabilities	4,235	2,869
Liabilities of discontinued operations		77
Total current liabilities	18,663	16,926
Noncurrent financing leases		30
Noncurrent operating leases	4,726	2,937
Other postretirement benefit obligations	385	382
Accrued pension liabilities	907	655
Deferred tax liabilities, net	1,018
Other long-term liabilities	4,398	2,171
Total liabilities	30,097	23,101
Commitments and contingencies (Note 20)
Shareholders' equity:
Common stock, $1.00 par value per share; 20,000 shares authorized; 8,951 and 8,781 shares issued and outstanding at December 31, 2020 and December 31, 2019, respectively	8,951	8,781
Additional paid-in capital	89,702	86,770
Accumulated deficit	(6,810)	(4,286)
Accumulated other comprehensive loss	(679)	(520)
Total shareholders' equity	91,164	90,745
Non-controlling interest	35	(253)
Total equity	91,199	90,492
Total liabilities and equity	$ 121,296	$ 113,593