Revenue Recognition (Tables)

3 Months Ended

Mar. 31, 2018

Revenue from Contract with Customer [Abstract]

Summary of Changes in Contract Assets and Liabilities

The following table presents changes in the Company’s contract assets and liabilities for the three months ended March 31, 2018.

	Balance at Beginning of Period		Additions		Deductions			Balance at End of Period
	(in thousands)
Contract Assets	$	67	$	129	$	(76	)	$	120
Contract Liabilities: Deferred Revenue	$	2,173	$	—	$	(1,344	)	$	829

Summary of Revenue Recognized

During the three months ended March 31, 2018 and 2017, the Company recognized the following revenues (in thousands).

	Three Months ended March 31, 2018		Three Months ended March 31, 2017
	(in thousands)		(in thousands)
Revenue recognized in the period from:
Amounts included in contract liabilities at the beginning of the period:
Performance obligations satisfied	$	1,315	$	1,662
New activities in the period:
Changes in the estimated transaction price allocated to performance obligations satisfied in prior periods – contract revenue		7		—
Performance obligations satisfied from new activities in the current period – contract revenue		22		—
Performance obligations satisfied from new activities in the current period – grant revenue		129		31
Total revenue	$	1,473	$	1,693