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Note 15 - Subsequent Events	12 Months Ended
	Mar. 31, 2014
Subsequent Events [Abstract]
Subsequent Events [Text Block]	Note 15. Subsequent Events In April 2014, we completed a business combination (the “BGI Acquisition”) whereby we acquired substantially all of the assets (other than cash and accounts receivable) and certain liabilities of BGI, Incorporated and BGI Instruments, Inc, (collectively “BGI”), for $9,900,000, subject to a post-closing adjustment. The operations of the acquired business will be included in our Instruments segment for reporting purposes. On April 23, 2014, our Board of Directors declared a quarterly cash dividend of $0.15 per share of common stock, payable on June 16, 2014, to stockholders of record at the close of business on May 30, 2014.

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The entire disclosure for significant events or transactions that occurred after the balance sheet date through the date the financial statements were issued or the date the financial statements were available to be issued. Examples include: the sale of a capital stock issue, purchase of a business, settlement of litigation, catastrophic loss, significant foreign exchange rate changes, loans to insiders or affiliates, and transactions not in the ordinary course of business.

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