Summary of Significant Accounting Policies (Tables)

12 Months Ended

Apr. 30, 2014

Accounting Policies [Abstract]

Schedule of Activity in Allowance for Doubtful Accounts

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

$ in thousands	2014			2013			2012
Balance at beginning of year	$	194		$	311		$	250
Bad debt provision		116			34			214
Doubtful accounts written off (net)		(81	)		(151	)		(153	)
Balance at end of year	$	229		$	194		$	311

Schedule of Property Plant and Equipment

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

$ in thousands	2014			2013			Useful Life
Land	$	41		$	41			N/A
Building and improvements		15,221			14,921			10-40 years
Machinery and equipment		31,129			30,147			5-10 years
Total		46,391			45,109
Less accumulated depreciation		(31,821	)		(30,011	)
Net property, plant and equipment	$	14,570		$	15,098

Summary of Fair Value Hierarchy for Financial Assets and Liabilities Measured Recurring and Nonrecurring Basis

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, 2014 and 2013 (in thousands):

	2014
Financial Assets		Level 1		Level 2		Level 3		Total
Trading securities held in deferred compensation plan (1)		$	3,313	$	—	$	—	$	3,313
Cash surrender value of life insurance policies (1)			—		88		—		88
Total		$	3,313	$	88	$	—	$	3,401
Financial Liabilities
Deferred compensation plans (2)		$	—	$	3,681	$	—	$	3,681
Interest rate swap derivative			—		211		—		211
Total		$	—	$	3,892	$	—	$	3,892
	2013
Financial Assets		Level 1		Level 2		Level 3		Total
Trading securities held in deferred compensation plan (1)		$	4,077	$	—	$	—	$	4,077
Cash surrender value of life insurance policies (1)			—		96		—		96
Total		$	4,077	$	96	$	—	$	4,173
Financial Liabilities
Deferred compensation plans (2)		$	—	$	4,399	$	—	$	4,399
Interest rate swap derivative			—		344		—		344
Total		$	—	$	4,743	$	—	$	4,743

(1) The Company maintains an executive compensation plan which includes 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) The deferred compensation plan liability is equal to the individual participants’ account balances under the plan.

Reconciliation of Basic to Diluted Weighted Average Common Shares Outstanding

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

Shares in thousands	2014		2013		2012
Weighted average common shares outstanding
Basic		2,608		2,587		2,579
Dilutive effect of stock options		26		13		1
Weighted average common shares outstanding—diluted		2,634		2,600		2,580