Stockholders' equity

12 Months Ended

Dec. 31, 2012

Stockholders' equity

Note 10—Stockholders’ equity:

	Shares of common stock
	Class A		Class B
	Issued and outstanding		Issued and outstanding
Balance at December 31, 2009		2,370,307		10,000,000
Issued		5,000		—
Balance at December 31, 2010		2,375,307		10,000,000
Issued		10,800		—
Balance at December 31, 2011		2,386,107		10,000,000
Issued		6,000		—
Balance at December 31, 2012		2,392,107		10,000,000

Class A and Class B common stock. The shares of Class A common stock and Class B common stock are identical in all respects, except for certain voting rights and certain conversion rights in respect of the shares of the Class B common stock. Holders of Class A common stock are entitled to one vote per share. NL, which holds all of the outstanding shares of Class B common stock, is entitled to one vote per share in all matters except for election of directors, for which NL is entitled to ten votes per share. Holders of all classes of common stock entitled to vote will vote together as a single class on all matters presented to the stockholders for their vote or approval, except as otherwise required by applicable law. Each share of Class A common stock and Class B common stock have an equal and ratable right to receive dividends to be paid from our assets when, and if declared by the board of directors. In the event of the dissolution, liquidation or winding up of our operations, the holders of Class A common stock and Class B common stock will be entitled to share equally and ratably in the assets available for distribution after payments are made to our creditors and to the holders of any of our preferred stock that may be outstanding at the time. Shares of the Class A common stock have no conversion rights. Under certain conditions, shares of Class B common stock will convert, on a share-for-share basis, into shares of Class A common stock.

Share repurchases and cancellations. Prior to 2010, our board of directors authorized various repurchases of shares of our Class A common stock in open market transactions, including block purchases, or in privately-negotiated transactions at unspecified prices and over an unspecified period of time. We may repurchase our common stock from time to time as market conditions permit. The stock repurchase program does not include specific price targets or timetables and may be suspended at any time. Depending on market conditions, we may terminate the program prior to its completion. We will generally use cash on hand to acquire the shares. Repurchased shares will be added to our treasury and cancelled. We made no treasury purchases during 2010, 2011 or 2012 and at December 31, 2012, approximately 678,000 shares were available for purchase under these authorizations.

Incentive compensation plan. We have a share based incentive compensation plan pursuant to which an aggregate of up to 200,000 shares of our common stock can be awarded to members of our board of directors. At December 31, 2012, all 200,000 shares were available for award under this plan.