Financial Instruments (Tables)

3 Months Ended

Mar. 31, 2013

Financial Instruments

Summary of valuation of financial instrument

	Total		Level 1		Level 2		Level 3
March 31, 2013
Available-for-sale securities	$	248,000	$	248,000	$	—	$	—
December 31, 2012
Available-for-sale securities	$	239,000	$	239,000	$	—	$	—