Leases (Details) $ in Thousands	1 Months Ended		3 Months Ended
	May 31, 2016 USD ($)	Dec. 31, 2013 USD ($) ft²	Mar. 31, 2019 USD ($)
Lessee, Lease, Description [Line Items]
Lessee, operating lease, renewal term			15 years
Lessee, operating lease, termination period			1 year
Sale and leaseback transaction, gain, net			$ (2,000)
Lessor, operating lease, remaining lease term			2 years
Lease income comprised of fixed lease payments			$ 300
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			$ 12
Leased square footage | ft²		2,200
Sublease notice period		90 days
Annual lease payments, related party	$ 146	$ 90	$ 36