Fair Value (Tables)

12 Months Ended

Dec. 31, 2017

Fair Value Disclosures [Abstract]

Fair Value Measurements, Recurring and Nonrecurring

The valuation methodologies used for the Company's financial instruments measured on a recurring basis at fair value, including the general classification of such instruments pursuant to the valuation hierarchy, is set forth in the tables below.

(in thousands)	As of December 31, 2017				Fair Value Measurements
	Carrying  Amount		Fair Value		Level 1	Level 2	Level 3
Liabilities:
Deferred acquisition cost	$	0	$	0			$	0

(in thousands)	As of December 31, 2016				Fair Value Measurements
	Carrying  Amount		Fair Value		Level 1	Level 2	Level 3
Liabilities:
Deferred acquisition cost	$	789	$	789			$	789

Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation

The following is a rollforward of deferred acquisition costs in 2016 and 2017.

(in thousands)	Acquisition of Polar		2015  Acquisition		Total Deferred Acquisition Cost Payable
Balance at January 1, 2016	$	667	$	1,235	$	1,902
Payments		(667)		(1,010)		(1,677)
Total adjustments included in earnings		—		564		564
Balance at December, 31, 2016	$	—	$	789	$	789
Payments		—		(789)		(789)
Total adjustments included in earnings		—		—		—
Balance at December 31, 2017	$	—	$	—	$	—