XML 65 R51.htm IDEA: XBRL DOCUMENT v2.4.0.8
United States Federal Statutory Tax Rate and Effective Tax Rate (Detail) (USD $)
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Statutory Tax Rate and Effective Tax Rate [Line Items]      
Statutory federal tax $ 11,965,000 $ 8,559,000 $ 9,688,000
State income taxes, net of federal benefit 304,000 679,000 1,015,000
Domestic manufacturer deduction (979,000) (902,000) (248,000)
FTC settlement 0 1,389,000 0
Other permanent differences 173,000 (190,000) 71,000
Research and development and jobs credits (459,000) (267,000) (336,000)
Other state income tax benefits (707,000) (686,000) (1,051,000)
Other (79,000) 0 0
Income Tax Expense, Total $ 10,218,000 $ 8,582,000 $ 9,139,000
Effective tax rate, Statutory federal tax 35.00% 35.00% 35.00%
Effective tax rate, State income taxes, net of federal benefit 0.90% 2.80% 3.70%
Effective tax rate, Domestic manufacturer deduction (2.90%) (3.70%) (0.90%)
Effective tax rate, FTC settlement 0.00% 5.70%  
Effective tax rate, Other permanent differences 0.50% (0.80%) 0.30%
Effective tax rate, Research and development and jobs credits (1.30%) (1.10%) (1.20%)
Effective tax rate, Other state income tax benefits (2.10%) (2.80%) (3.90%)
Effective tax rate, Other (0.20%)    
Effective tax rate, Total 29.90% 35.10% 33.00%