Revenue - Schedule of Net Cumulative-effect Adjustment to Retained Earnings for the Adoption of ASC 606 (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Jul. 01, 2018	Jun. 30, 2018
ASSETS
Account receivable, net	$ 86,333		$ 65,994
Deferred cost of revenue - current	273		1,141
Prepaid expenses and other current assets	18,476		15,569
Other assets	16,528		11,576
LIABILITIES AND STOCKHOLDERS' EQUITY
Other accrued liabilities	24,101		22,448
Deferred revenue - current	72,726	$ 75,515	75,404
Long-term other liabilities	10,693		8,608
Accumulated deficit	$ (482,956)		$ (474,285)
ASC 606
ASSETS
Account receivable, net		66,251
Deferred cost of revenue - current		677
Prepaid expenses and other current assets		16,239
Other assets		17,416
LIABILITIES AND STOCKHOLDERS' EQUITY
Other accrued liabilities		23,059
Deferred revenue - current		75,515
Long-term other liabilities		9,075
Accumulated deficit		(469,171)
ASC 606 | Adjustment Due to ASC 606
ASSETS
Account receivable, net		257
Deferred cost of revenue - current		(464)
Prepaid expenses and other current assets		670
Other assets		5,840
LIABILITIES AND STOCKHOLDERS' EQUITY
Other accrued liabilities		611
Deferred revenue - current		111
Long-term other liabilities		467
Accumulated deficit		$ 5,114