Consolidated Balance Sheets - USD ($) $ in Thousands	Apr. 30, 2022	Apr. 30, 2021
Current assets:
Cash and cash equivalents	$ 11,561	$ 9,807
Marketable securities	9,964	10,313
Accounts receivable, net of allowance for doubtful accounts of $111 at April 30, 2022 and April 30, 2021	4,291	5,515
Contract assets	9,977	12,640
Inventories, net	19,906	19,661
Prepaid income taxes	269	444
Prepaid expenses and other	1,162	991
Total current assets	57,130	59,371
Property, plant and equipment, at cost, net of accumulated depreciation and amortization	8,564	9,612
Goodwill	617	617
Cash surrender value of life insurance	9,855	15,396
Other assets	909	1,939
Right-of-Use assets – operating leases	8,805	9,773
Total assets	85,880	96,708
Current liabilities:
Accounts payable – trade	1,080	1,080
Accrued liabilities	3,696	5,245
Loss provision accrual	4,243	57
Operating lease liability, current portion	1,744	1,715
Contract liabilities	12,218	10,692
Total current liabilities	22,981	18,789
Deferred compensation	8,730	14,017
Deferred taxes	8	8
Operating lease liability – non-current	7,353	8,366
Other liabilities	120	119
Total liabilities	39,192	41,299
Commitments and contingencies (Note 16)
Stockholders’ equity:
Preferred stock - $1.00 par value; authorized 600 shares, no shares issued
Common stock - $1.00 par value; authorized 20,000 shares, 9,298 shares issued and 9,297 shares outstanding at April 30, 2022; 9,226 shares issued and 9,225 shares outstanding at April 30, 2021	9,298	9,226
Additional paid-in capital	57,956	57,355
Accumulated deficit	(20,120)	(11,457)
Common stock reacquired and held in treasury - at cost (1 share at April 30, 2022 and April 30, 2021)	(6)	(6)
Accumulated other comprehensive income (loss)	(440)	291
Total stockholders’ equity	46,688	55,409
Total liabilities and stockholders’ equity	$ 85,880	$ 96,708