Leases (Details)	1 Months Ended		3 Months Ended	6 Months Ended
	May 31, 2016 USD ($)	Dec. 31, 2013 USD ($) ft²	Jun. 30, 2019 USD ($)	Jun. 30, 2019 USD ($)
Lessee, Lease, Description [Line Items]
Lessee, operating lease, renewal term			15 years	15 years
Lessee, operating lease, termination period				1 year
Sale and leaseback transaction, gain, net				$ (2,000,000.0)
Lessor, operating lease, remaining lease term				2 years
Lease income comprised of fixed lease payments			$ 300,000	$ 500,000
Minimum
Lessee, Lease, Description [Line Items]
Lessee, operating lease, remaining lease term				1 month
Maximum
Lessee, Lease, Description [Line Items]
Lessee, operating lease, remaining lease term				5 years
Leased Office Space | Lease Agreements | Family Member(s) of Largest Shareholder
Lessee, Lease, Description [Line Items]
Payments received from related party			0	$ 12,000
Leased square footage | ft²		2,200
Sublease notice period		90 days
Annual lease payments, related party	$ 100,000	$ 100,000	$ 12,000	$ 49,000