Investments (Tables)

6 Months Ended

Jun. 30, 2015

Investments Debt And Equity Securities [Abstract]

Summary of Investments

We did not hold investments as of December 31, 2014 and our investments as of June 30, 2015 were as follows (in thousands):

	Amortized Cost		Unrealized Gains		Unrealized Losses			Fair Value/Net Carrying Value		Cash and Cash Equivalents		Investments
Money market funds	$	4,485	$	-	$	-		$	4,485	$	4,485	$	-
Commercial paper		32,481		-		-			32,481		5,999		26,482
Corporate debt securities		35,870		3		(28	)		35,845		1,457		34,387
Municipal bonds		8,748		5		-			8,753		4,971		3,783
		81,584		8		(28	)		81,564		16,912		64,652

Components of Interest Expense Incurred on Notes and on Other Borrowings

The following table presents the components of interest expense incurred on the Notes and on other borrowings (in thousands):  

	Three Months Ended		Six Months Ended
	June 30, 2015		June 30, 2015
2.50% Convertible Notes:
Interest expense at 2.50% coupon rate	$	725	$	725
Amortization of debt discount		921		921
Amortization of deferred debt issuance costs		97		97
Total interest from 2.50% convertible notes		1,743		1,743
Other Borrowings:
Interest from other borrowings		25		459
Total interest	$	1,768	$	2,202
	Three Months Ended		Six Months Ended
	June 30, 2014		June 30, 2014
Other Borrowings:
Interest from other borrowings	$	84	$	195
Total interest	$	84	$	195