This element represents the amount of recognized equity-based compensation during the period, that is, the amount recognized as expense in the income statement (or as asset if compensation is capitalized). Alternate captions include the words "stock-based compensation".

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Amount of increase in additional paid in capital (APIC) resulting from a tax benefit associated with share-based compensation plan other than an employee stock ownership plan (ESOP). Includes, but is not limited to, excess tax benefit.

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Amount of paid and unpaid cash, stock, and paid-in-kind (PIK) dividends declared, for example, but not limited to, common and preferred stock.

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The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

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- Definition

Number of shares of stock issued as of the balance sheet date, including shares that had been issued and were previously outstanding but which are now held in the treasury.

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- Definition

Amount of stockholders' equity (deficit), net of receivables from officers, directors, owners, and affiliates of the entity, attributable to both the parent and noncontrolling interests. Amount excludes temporary equity. Alternate caption for the concept is permanent equity.

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Number of new stock issued during the period.

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Number of shares (or other type of equity) issued during the period as a result of any equity-based compensation plan other than an employee stock ownership plan (ESOP), net of any shares forfeited. Shares issued could result from the issuance of restricted stock, the exercise of stock options, stock issued under employee stock purchase plans, and/or other employee benefit plans.

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- Definition

Number of share options (or share units) exercised during the current period.

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Equity impact of the value of new stock issued during the period. Includes shares issued in an initial public offering or a secondary public offering.

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Value of stock issued as a result of the exercise of stock options.

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Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method.

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Consolidated Statement of Equity (USD $) In Thousands, except Share data	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Noncontrolling Interest [Member]	Total
Balance at Apr. 30, 2012	$ 124	$ 50,357	$ 211,134	$ (77,242)	$ 100	$ 184,473
Shares (in Shares) at Apr. 30, 2012	12,371,167
Issuance of common stock, value		143				143
Issuance of common stock, shares (in Shares)	4,242
Stock options exercised, value		790				790
Stock options exercised, shares (in Shares)	35,750					35,750
Purchase of treasury shares				(17,305)		(17,305)
Tax benefit of stock based compensation		190				190
Stock based compensation, value		1,852				1,852
Stock based compensation, shares (in Shares)	3,500
Dividends on subsidiary preferred stock			(40)			(40)us-gaap_Dividends
Net income			32,165			32,165us-gaap_ProfitLoss
Balance at Apr. 30, 2013	124	53,332	243,259	(94,547)	100	202,268
Shares (in Shares) at Apr. 30, 2013	12,414,659
Issuance of common stock, value		151				151
Issuance of common stock, shares (in Shares)	4,150
Stock options exercised, value	1	719				720
Stock options exercised, shares (in Shares)	30,500					30,500
Purchase of treasury shares				(12,754)		(12,754)
Tax benefit of stock based compensation		141				141
Stock based compensation, value		1,391				1,391
Stock based compensation, shares (in Shares)	3,500
Dividends on subsidiary preferred stock			(40)			(40)us-gaap_Dividends
Net income			21,129			21,129us-gaap_ProfitLoss
Balance at Apr. 30, 2014	125	55,734	264,348	(107,301)	100	213,006
Shares (in Shares) at Apr. 30, 2014	12,452,809
Issuance of common stock, value		146				146
Issuance of common stock, shares (in Shares)	3,831
Stock options exercised, value	2	4,141				4,143
Stock options exercised, shares (in Shares)	212,250					212,250
Purchase of treasury shares				(20,020)		(20,020)
Tax benefit of stock based compensation		1,627				1,627
Stock based compensation, value		780				780
Stock based compensation, shares (in Shares)	20,000
Dividends on subsidiary preferred stock			(40)			(40)us-gaap_Dividends
Net income			29,490			29,490us-gaap_ProfitLoss
Balance at Apr. 30, 2015	$ 127	$ 62,428	$ 293,798	$ (127,321)	$ 100	$ 229,132
Shares (in Shares) at Apr. 30, 2015	12,688,890