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Debt - Principal and Interest Payments on Debt (Detail)
$ in Thousands
Jun. 30, 2015
USD ($)
Debt Instrument [Line Items]  
2015, Principal [1] $ 0
2016, Principal [1] 5,226
2017, Principal [1] 5,603
2018, Principal [1] 6,007
2019, Principal [1] 3,164
Total, Principal [1] 20,000
2015, Interest [1] 640
2016, Interest [1] 1,231
2017, Interest [1] 854
2018, Interest [1] 450
2019, Interest [1] 1,465
Total, Interest [1] 4,640
2015, Total [1] 640
2016, Total [1] 6,457
2017, Total [1] 6,457
2018, Total [1] 6,457
2019, Total [1] 4,629
Total [1] $ 24,640
[1] Unless interest only period extends to December 31, 2016, as described below.