Fair Value of Assets and Liabilities (Tables)

9 Months Ended

Sep. 30, 2017

Fair Value of Assets and Liabilities

Schedule of assets and liabilities measured and recorded in financial statements at fair value on a recurring basis

			Quoted Prices
			in Active
			Markets		Significant
			for Identical		Other		Significant
			Assets or		Observable		Unobservable
			Liabilities		Inputs		Inputs
(In thousands)	Total		(Level 1)		(Level 2)		(Level 3)
September 30, 2017
Assets
Money market funds	$	49,637	$	49,637	$	—	$	—
Short-term investments – municipal bonds		1,400		—		1,400		—
Total Assets	$	51,037	$	49,637	$	1,400	$	—
Total Liabilities	$	—	$	—	$	—	$	—
December 31, 2016
Assets
Money market funds	$	67,580	$	67,580	$	—	$	—
Short-term investments –  corporate bonds		19,729		—		19,729		—
Short-term investments – municipal bonds		8,618		—		8,618		—
Total Assets	$	95,927	$	67,580	$	28,347	$	—
Total Liabilities	$	—	$	—	$	—	$	—