CONDENSED STATEMENTS OF CASH FLOWS (USD $) In Thousands	6 Months Ended
Sep. 30, 2011	Sep. 30, 2010
Cash Flows From Operating Activities:
Net Income	$ 3,733	$ 2,749
Depreciation and Amortization	1,102	834
Stock Based Compensation	192	162
Change in Assets and Liabilities-
(Increase) Decrease in Accounts Receivable, net	361	556
(Increase) Decrease in Inventories	722	(544)
(Increase) Decrease in Prepaid Expenses	137	354
Increase (Decrease) in Accounts Payable	(122)	(137)
Increase (Decrease) in Accrued Liabilities	(1,550)	100
Net Cash and Cash Equivalents Provided by Operating Activities	4,575	4,074
Cash Flows From Investing Activities:
Acquisition of Product Lines and Company		(11,722)
Deposits	30	(17)
Capital Expenditures, Building		(2,150)
Capital Expenditures, Net of Retirements	(343)	(310)
Net Cash and Cash Equivalents (Used in) Investing Activities	(313)	(14,199)
Cash Flows From Financing Activities:
Bank Borrowing		4,521
Debt Payments	(2,500)	(578)
Dividends Paid	(788)	(709)
Treasury Stock Purchases	(80)	(81)
Proceeds From Stock Options Exercised	512	76
Net Cash and Cash Equivalents (Used in) Provided by Financing Activities	(2,856)	3,229
Net Increase (Decrease) In Cash and Cash Equivalents	1,406	(6,896)
Cash and Cash Equivalents at Beginning of Period	3,546	10,471
Cash and Cash Equivalents at End of Period	4,952	3,575
Cash paid for Interest	111	55
Supplemental disclosure of non-cash activity:
The Company issued employee loans for the purchase of common stock during the six month period ended September 30, 2011 and 2010, respectively	235	307
Loans outstanding retired	304
Accrued initial payment	$ 150

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Future cash outflow to pay for acquisitions of technology that have occurred.

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Includes currency on hand as well as demand deposits with banks or financial institutions. It also includes other kinds of accounts that have the general characteristics of demand deposits in that the Entity may deposit additional funds at any time and also effectively may withdraw funds at any time without prior notice or penalty. Cash equivalents, excluding items classified as marketable securities, include short-term, highly liquid investments that are both readily convertible to known amounts of cash, and so near their maturity that they present minimal risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three years ago does not become a cash equivalent when its remaining maturity is three months. Compensating balance arrangements that do not legally restrict the withdrawal or usage of cash amounts may be reported as Cash and Cash Equivalents, while legally restricted deposits held as compensating balances against borrowing arrangements, contracts entered into with others, or company statements of intention with regard to particular deposits are not generally reported as cash and cash equivalents. Includes cash and cash equivalents associated with the entity's continuing operations. Excludes cash and cash equivalents associated with the disposal group (and discontinued operation).

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Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The cash inflow associated with the amount received from holders exercising their stock options. This item inherently excludes any excess tax benefit, which the entity may have realized and reported separately.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

-URI http://asc.fasb.org/extlink&oid=6513228

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (j)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph i

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 14

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3255-108585

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 95

-Paragraph 18

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 95

-Paragraph 19

-Subparagraph a

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

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Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations.

+ Details

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Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

+ References

+ Details

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Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration