Material Contracts with Suppliers (Details) (JSP, USD $) In Thousands, unless otherwise specified	1 Months Ended	6 Months Ended	3 Months Ended		6 Months Ended
	Mar. 31, 2004	Dec. 31, 2012 item	Dec. 31, 2012 Inventory purchases Suppliers	Dec. 31, 2011 Inventory purchases Suppliers	Dec. 31, 2012 Inventory purchases Suppliers	Dec. 31, 2011 Inventory purchases Suppliers
Material Contracts with Suppliers
Purchases of finished goods inventory from JSP as percentage of the company's inventory purchases			54.00%	53.00%	56.00%	56.00%
Number of shares of common stock issued in exchange for exclusive distribution rights	4,000
Term of agreement	10 years
Period from notice within which if breach is not cured, non-breaching party has right to terminate contract		30 days
Minimum quantity to be purchased in the first year		$ 15,000
Per year increase in minimum quantity to be purchased		1,000
Minimum quantity to be purchased for the last year of the ten-year contract		$ 24,000
Minimum purchase requirement met by the company		8 years
Number of persons the supplier is entitled to nominate to serve on the entity's board of directors		1