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Subsequent Events	12 Months Ended
	Dec. 31, 2013
Subsequent Events [Abstract]
Subsequent Events	Note 12.  Subsequent Events During the first quarter of 2014, the Company sold 39,179 shares of Rudolph Technology stock for proceeds of $439 resulting in a gain on the sale of $434. On February 18, 2014, the Company purchased the Insta-Link wireless hazard technology monitoring system and product family, together with related technology and intellectual property rights, from an independent third party.  The Company agreed to pay $1,200 for the product line, of which $400 was paid at closing, and additional payments of $400 will be paid on each of the first and second anniversary of the closing.  The seller may earn up to an additional $550 of purchase price, depending upon the achievement of revenue measures during the four calendar years following the closing.

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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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