Stockholders' Deficit - Share Repurchase Program (Details) $ in Thousands	Jun. 30, 2019 USD ($)
Common stock repurchase program
Share repurchase program
Stock repurchase program, authorized amount	$ 2,075

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

Name:	us-gaap_EquityClassOfTreasuryStockLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration