ValveXchange Investment (Details) (USD $) Share data in Millions, unless otherwise specified	1 Months Ended	12 Months Ended
	Jul. 31, 2011	Dec. 31, 2012	Oct. 31, 2012	Jul. 31, 2012
Schedule of Equity Method Investments [Line Items]
Loans receivable, revolving credit line, interest rate	8.00%
Amount of loan advanced		$ 2,000,000
ValveXchange, Inc. [Member]
Schedule of Equity Method Investments [Line Items]
Equity ownership percent		19.00%
Loans receivable, revolving credit line, maximum capacity	2,000,000
Loans receivable, revolving credit line, expiration date	Jul. 30, 2018
Loan origination costs net of fees	117,000
Amount of loan advanced		2,000,000	1,000,000	1,000,000
ValveXchange, Inc. [Member] | Series A Preferred Stock [Member]
Schedule of Equity Method Investments [Line Items]
Preferred stock purchased, shares	2.4
Preferred stock purchased, value	3,500,000
Preferred stock, written down investment		340,000
Preferred stock carrying value		$ 3,200,000