Financial Instruments - Fair Value Measurements (Details) $ in Thousands	Mar. 31, 2019 USD ($)
Level 2 [Member]
Fair Value of Financial Instruments [Abstract]
Assets, fair value	$ 0
Liabilities, fair value	0
Level 3 [Member]
Fair Value of Financial Instruments [Abstract]
Assets, fair value	0
Liabilities, fair value	$ 0