Despite a 6% increase in sales, fourth-quarter earnings fell at Restoration Hardware ( RSTO), and the company missed analysts' estimates by a penny a share.

Investors sold off the stock following the report, which came after the close of regular trading. In after-hours exchanges, the company's shares were recently down 18 cents, or 3.7%, to $4.70. Restoration Hardware closed Thursday's regular session off 5 cents, or 1%, to $4.88.

The home furnishing retailer earned $7.89 million, or 21 cents a share, in the quarter on $164.96 million in sales. In the year-ago period, the company posted profits of $9.71 million, or 26 cents a share, on sales of $155.17 million.

Analysts polled by Thomson First Call were expecting earnings of 22 cents a share on $165 million in revenue.

Restoration Hardware expects to lose 13 cents to 16 cents a share in the first quarter. The company expects to post a same-store sales increase in the low- to mid-single digits on a percentage basis for the full year. (Same-store sales compare the results of like outlets open more than one year.)

That bottom-line result is potentially worse than Wall Street's expectations. Analysts forecast that the company would lose 14 cents a share in the first quarter on sales of $85.77 million.