CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 50,064	$ 63,777
Accounts receivable, net	9,528	8,480
Inventories, net	11,890	11,223
Deferred income taxes	2,691	2,691
Prepaid expenses and other	2,445	4,424
Total current assets	76,618	90,595
Other assets:
Goodwill	23,742	23,742
Other noncurrent	514	2,119
Total other assets	24,256	25,861
Property and equipment:
Land	4,928	4,928
Buildings	20,521	20,521
Equipment	56,213	58,603
Construction in progress	1,686	1,442
Property, Plant and Equipment, Gross, Total	83,348	85,494
Less accumulated depreciation	49,975	51,767
Net property and equipment	33,373	33,727
Total assets	134,247	150,183
Current liabilities:
Current maturities of note payable to affiliate	1,000	1,000
Accounts payable and accrued liabilities	7,929	11,061
Income taxes payable to affiliate	406	12,197
Other	4	203
Total current liabilities	9,339	24,461
Noncurrent liabilities:
Long-term debt	17,230	17,480
Deferred income taxes	6,272	6,182
Total noncurrent liabilities	23,502	23,662
Stockholders' equity:
Preferred stock
Additional paid-in capital	55,203	55,203
Retained earnings	46,079	46,733
Total stockholders' equity	101,406	102,060
Total liabilities and stockholders' equity	134,247	150,183
Commitments and contingencies (Note 1)
Class A Common Stock [Member]
Stockholders' equity:
Common stock	24	24
Total stockholders' equity	24	24
Class B Common Stock [Member]
Stockholders' equity:
Common stock	100	100
Total stockholders' equity	$ 100	$ 100