XML 29 R19.htm IDEA: XBRL DOCUMENT

Revenue Recognition (Tables)

9 Months Ended

Sep. 30, 2018

Revenue Recognition [Abstract]

Schedule of changes in contract assets and liabilities

						Revenue
		Balance at				Recognized
		Beginning of				In Advance of								Balance at End of
		Period				Billings				Billings				Period
Three months ended September 30, 2017
Contract assets:
Unbilled receivables		$	1,883			$	43			$	(283	)		$	1,643

Three months ended September 30, 2018
Contract assets:
Unbilled receivables		$	1,542			$	1,170			$	(557	)		$	2,155

		Balance at
		Beginning of								Revenue				Balance at End of
		Period				Billings				Recognized				Period
Three months ended September 30, 2017
Contract liabilities:
Deferred revenue		$	2,291			$	1,527			$	(1,089	)		$	2,729

Three months ended September 30, 2018
Contract liabilities:
Deferred revenue		$	2,421			$	1,991			$	(1,297	)		$	3,115

						Revenue
		Balance at				Recognized
		Beginning of				In Advance of								Balance at End of
		Period				Billings				Billings				Period
Nine months ended September 30, 2017
Contract assets:
Unbilled receivables		$	2,259			$	169			$	(785	)		$	1,643

Nine months ended September 30, 2018
Contract assets:
Unbilled receivables		$	1,429			$	1,745			$	(1,019	)		$	2,155

		Balance at
		Beginning of								Revenue				Balance at End of
		Period				Billings				Recognized				Period
Nine months ended September 30, 2017
Contract liabilities:
Deferred revenue		$	2,933			$	3,430			$	(3,634	)		$	2,729

Nine months ended September 30, 2018
Contract liabilities:
Deferred revenue		$	2,932			$	4,176			$	(3,993	)		$	3,115