Investments (Tables)

12 Months Ended

Dec. 31, 2013

Investments

Schedule of investments

December 31, 2012	Cost			Estimated Fair Value		Carrying Value
Investments:
Short-term:
Warrant to purchase common stock	$		124	$	—	$	—
Available for sale common stock	$		207	$	242	$	242
Total available for sale	331			242		242
Total short term	$	331		$	242	$	242