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Commitments and Contingencies - Additional Information (Detail)
3 Months Ended 12 Months Ended 57 Months Ended
Dec. 28, 2015
USD ($)
ft²
Jan. 09, 2015
USD ($)
ft²
Mar. 31, 2017
ft²
Lease
Mar. 31, 2017
USD ($)
ft²
Lease
Mar. 31, 2016
USD ($)
Mar. 31, 2015
USD ($)
Mar. 31, 2017
USD ($)
Lease
Commitments And Contingencies Disclosure [Abstract]              
Number of non-cancelable leases | Lease     3 3     3
Rent expense per month       $ 120,000      
Base rent escalators   3.00% 3.00% 3.00%     3.00%
Office space under lease agreement | ft²     14,685 45,580      
Lease expiration date     Dec. 15, 2018 Sep. 01, 2021      
Lease option termination description       option to terminate this lease on or after September 1, 2019      
Area of leased office space | ft² 12,088 5,803          
Lease term   36 months          
Lease rental period start date Feb. 01, 2016 Feb. 01, 2015          
Lease rental period end date Jan. 31, 2017 Jan. 31, 2018          
Base rent under the lease $ 15,000 $ 12,000          
Leasehold improvements         $ 374,000 $ 144,000 $ 518,000
Rent expense       $ 1,295,000 $ 1,088,000 $ 968,000