Consolidated Statements of Stockholders’ Equity (USD $) In Thousands, except Share data	Common Stock [Member]	Employee Loans [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Total
Balance at Mar. 31, 2012	$ 8,900	$ (396)	$ 35,411		$ 43,915us-gaap_StockholdersEquity
Shares (in Shares) at Mar. 31, 2012	3,321,965
Common stock issued for conversion of stock options	1,101	(203)			898
Common stock issued for conversion of stock options, shares (in Shares)	77,753				93,325
Purchase and retirement of common stock	(56)	450	(496)		(102)
Purchase and retirement of common stock (in Shares)	(11,170)
Dividends paid			(1,815)		(1,815)us-gaap_DividendsCommonStockCash
Stock-based compensation	1,112				1,112
Tax impact on exercise of stock options	295				295
Net income			8,450		8,450
Balance at Mar. 31, 2013	11,352	(149)	41,550		52,753us-gaap_StockholdersEquity
Shares (in Shares) at Mar. 31, 2013	3,388,548
Common stock issued for conversion of stock options	1,845				1,845
Common stock issued for conversion of stock options, shares (in Shares)	104,864				117,885
Purchase and retirement of common stock	(147)	125			(22)
Purchase and retirement of common stock (in Shares)	(2,784)
Dividends paid			(1,989)		(1,989)us-gaap_DividendsCommonStockCash
Stock-based compensation	840				840
Tax impact on exercise of stock options	1,906				1,906
Net income			9,000		9,000
Balance at Mar. 31, 2014	15,796	(24)	48,561		64,333us-gaap_StockholdersEquity
Shares (in Shares) at Mar. 31, 2014	3,490,628				3,490,628us-gaap_CommonStockSharesIssued
Common stock issued for conversion of stock options	1,504				1,504
Common stock issued for conversion of stock options, shares (in Shares)	70,912				82,178
Purchase and retirement of common stock	(28)	24			(4)
Dividends paid			(2,182)		(2,182)us-gaap_DividendsCommonStockCash
Stock-based compensation	993				993
Tax impact on exercise of stock options	(514)				(514)
Foreign currency translation				(234)	(234)
Net income			9,583		9,583
Balance at Mar. 31, 2015	$ 17,751		$ 55,962	$ (234)	$ 73,479us-gaap_StockholdersEquity
Shares (in Shares) at Mar. 31, 2015	3,561,540				3,561,540us-gaap_CommonStockSharesIssued

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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Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

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Amount of paid and unpaid common stock dividends declared with the form of settlement in cash.

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Net income after adjustments for dividends on preferred stock (declared in the period) and/or cumulative preferred stock (accumulated for the period).

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Amount after tax and reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.

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Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.

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

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

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Number of shares that have been repurchased and retired during the period.

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Equity impact of the value of stock that has been repurchased and retired during the period. The excess of the purchase price over par value can be charged against retained earnings (once the excess is fully allocated to additional paid in capital).

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