Debt - Principal and Interest Payments on Debt (Detail) $ in Thousands	Mar. 31, 2017 USD ($)
Debt Disclosure [Abstract]
2017, Principal	$ 5,771
2018, Principal	8,178
2019, Principal	4,308
Total, Principal	18,257
2017, Interest	823
2018, Interest	613
2019, Interest	1,488
Total, Interest	2,924
2017, Total	6,594
2018, Total	8,791
2019, Total	5,796
Total	$ 21,181