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Summary of Significant Accounting Policies (Tables)

12 Months Ended

Apr. 30, 2021

Accounting Policies [Abstract]

Cash and Cash Equivalents and Restricted Cash

The reconciliation between the consolidated balance sheet and the consolidated statement of cash flows at April 30 is as follows:

$ in thousands						2021						2020
Cash and cash equivalents						$	5,206					$	4,365
Restricted cash						525						850
Total cash, cash equivalents and restricted cash						$	5,731					$	5,215

Schedule Of Allowance For Doubtful Accounts

The activity in the allowance for doubtful accounts for each of the years ended April 30 was:

$ in thousands						2021						2020
Balance at beginning of year						$	606					$	361
Bad debt provision						53						364
Doubtful accounts written off (net)						(23)						(119)
Balance at end of year						$	636					$	606

Schedule of Property, Plant and Equipment

Property, plant and equipment consisted of the following at April 30:

$ in thousands						2021						2020						Useful Life
Land						$	41					$	41					N/A
Building and improvements						17,017						16,920						10-40 years
Machinery and equipment						41,746						40,898						5-10 years
Total						58,804						57,859
Less accumulated depreciation						(42,822)						(41,587)
Net property, plant and equipment						$	15,982					$	16,272

Fair Value Hierarchy for Assets and Liabilities

The following tables summarize the Company's fair value hierarchy for its financial assets and liabilities measured at fair value on a recurring and nonrecurring basis as of April 30, 2021 and 2020 (in thousands):

			2021
			Level 1						Level 2						Level 3						Total
Financial Assets
Trading securities held in non-qualified compensation plans (1)			$	1,299					$	—					$	—					$	1,299
Cash surrender value of life insurance policies (1)			—						1,458						—						1,458
Total			$	1,299					$	1,458					$	—					$	2,757
Financial Liabilities
Non-qualified compensation plans (2)			$	—					$	3,169					$	—					$	3,169
Total			$	—					$	3,169					$	—					$	3,169

			2020
			Level 1						Level 2						Level 3						Total
Financial Assets
Trading securities held in non-qualified compensation plans (1)			$	2,485					$	—					$	—					$	2,485
Cash surrender value of life insurance policies (1)			—						87						—						87
Total			$	2,485					$	87					$	—					$	2,572
Financial Liabilities
Non-qualified compensation plans (2)			$	—					$	2,899					$	—					$	2,899
Total			$	—					$	2,899					$	—					$	2,899

(1)The Company maintains two non-qualified compensation plans which include investment assets in a rabbi trust. These assets consist of marketable securities, which are valued using quoted market prices multiplied by the number of shares owned, and life insurance policies, which are valued at their cash surrender value.

(2)Plan liabilities are equal to the individual participants' account balances and other earned retirement benefits.

Reconciliation of Basic to Diluted Weighted Average Shares Outstanding

The following is a reconciliation of basic to diluted weighted average common shares outstanding:

Shares in thousands						2021						2020
Weighted average common shares outstanding
Basic						2,760						2,750
Dilutive effect of stock options and RSUs						—						—
Weighted average common shares outstanding—diluted						2,760						2,750

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