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Summary of Principal Contractual Obligations (Detail)
$ in Thousands
Mar. 31, 2019
USD ($)
Purchase Commitments  
2019 (remaining nine months) $ 12,998
2020 872
Total 13,870
Other Contractual Commitments  
2019 (remaining nine months) 102
Total 102
Total Commitments  
2019 (remaining nine months) 13,100
2020 872
Total $ 13,972