Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2013

Fair Value Measurements

Summary of valuation of financial instrument pricing levels

	Total		Level 1		Level 2		Level 3
March 31, 2013
Available-for-sale securities	$	710,000	$	710,000	$	—	$	—
December 31, 2012
Available-for-sale securities	$	680,000	$	680,000	$	—	$	—