Summary of Significant Accounting Policies - Narrative (Details) - USD ($) $ in Thousands, shares in Millions	3 Months Ended
	Jun. 30, 2017	Mar. 31, 2017
Restricted Share Awards
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from calculation of diluted weighted-average common shares outstanding (in shares)	1.4
Options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from calculation of diluted weighted-average common shares outstanding (in shares)	2.4
Additional Paid in Capital
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Adjustment to adopt ASU 2016-09		$ 122
Accumulated Deficit
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Adjustment to adopt ASU 2016-09		(122)
Accounting Standards Update 2016-09 | Additional Paid in Capital
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Adjustment to adopt ASU 2016-09		100
Accounting Standards Update 2016-09 | Accumulated Deficit
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Adjustment to adopt ASU 2016-09		$ (100)