Summary of Significant Accounting Policies - Fair Value (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018
Measured on a recurring basis | Convertible Note
Assets and liabilities measured at fair value on a recurring and nonrecurring basis
Convertible note	$ 5,006	$ 5,006	$ 5,006
Measured on a nonrecurring basis
Assets and liabilities measured at fair value on a recurring and nonrecurring basis
Lease exit liability			1,779
Measured on a nonrecurring basis | Significant Unobservable Inputs (Level 3)
Assets and liabilities measured at fair value on a recurring and nonrecurring basis
Lease exit liability			1,779
Acquisitions | Measured on a recurring basis | Convertible Note
Assets and liabilities measured at fair value on a recurring and nonrecurring basis
Convertible note	5,006		5,006	$ 5,006	$ 5,006
Acquisitions | Measured on a recurring basis | Significant Unobservable Inputs (Level 3) | Convertible Note
Assets and liabilities measured at fair value on a recurring and nonrecurring basis
Convertible note	$ 5,006		$ 5,006