Consolidated Condensed Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 15,177	$ 8,523
Restricted cash	616	639
Short-term investment securities	16,889	23,451
Accounts receivable, less allowance for doubtful accounts of $331 at March 31, 2020 and $325 at December 31, 2019	8,241	8,993
Inventories	19,115	16,377
Contract assets	10,079	10,237
Other current assets	1,426	1,975
Current assets of discontinued operations		80
Total current assets	71,543	70,275
Machinery and equipment	42,944	41,073
Less: Accumulated depreciation	28,213	27,522
Net machinery and equipment	14,731	13,551
Goodwill	9,551	9,551
Operating lease right-of-use assets, net	3,862	4,372
Investment in partnerships	750	1,160
Long-term investments securities	5,379	8,629
Other assets, net	5,902	6,055
Total assets	111,718	113,593
Current liabilities:
Current financing leases	88	101
Current operating leases	1,605	1,729
Accounts payable	10,392	9,876
Accrued salaries, wages and commissions	2,736	2,274
Other accrued liabilities	2,474	2,869
Liabilities of discontinued operations		77
Total current liabilities	17,295	16,926
Noncurrent financing leases	15	30
Noncurrent operating leases	2,503	2,937
Other postretirement benefit obligations	371	382
Accrued pension liabilities	651	655
Other long-term liabilities	2,106	2,171
Total liabilities	22,941	23,101
Commitments and contingencies (Note 15)
Shareholders' equity:
Common stock, $1.00 par value per share; 20,000 shares authorized; 8,819 and 8,781 shares issued and outstanding at March 31, 2020 and December 31, 2019, respectively	8,819	8,781
Additional paid-in capital	86,978	86,770
Accumulated deficit	(6,265)	(4,286)
Accumulated other comprehensive loss	(502)	(520)
Total shareholders' equity	89,030	90,745
Non-controlling interest	(253)	(253)
Total equity	88,777	90,492
Total liabilities and equity	$ 111,718	$ 113,593