Leases, Commitments and Contingencies - Operating Leases - Additional Information (Detail)				1 Months Ended				3 Months Ended
	Oct. 02, 2018 ft²	Sep. 30, 2018 ft²	Aug. 01, 2018 ft²	Dec. 31, 2018 ft²	Oct. 31, 2018 ft²	May 31, 2018 ft²	Apr. 30, 2018 ft²	Mar. 31, 2019 USD ($)	Mar. 31, 2018 ft²
Commitments And Contingencies [Line Items]
Operating lease option to extend								true
Operating lease renewal term								5 years
Expenses for short term lease | $								$ 200,000
Right of use assets recorded arising from new lease liabilities | $								$ 0
Operating Lease One [Member]
Commitments And Contingencies [Line Items]
Office space rent under operating lease					58,442
Lease expire date					Aug. 31, 2024
Increased office space rent		54,943			3,499
Operating Lease Two [Member]
Commitments And Contingencies [Line Items]
Office space rent under operating lease							40,419		19,805
Lease expire date							Aug. 31, 2024	Aug. 31, 2024	Feb. 28, 2022
Increased office space rent	7,133		13,481				20,614
Operating Lease Three [Member]
Commitments And Contingencies [Line Items]
Office space rent under operating lease						15,525
Lease expire date						Nov. 30, 2024
Operating Lease Five [Member]
Commitments And Contingencies [Line Items]
Office space rent under operating lease				15,975
Lease expire date				Feb. 28, 2024
Minimum [Member]
Commitments And Contingencies [Line Items]
Operating lease remaining lease terms								1 year
Maximum [Member]
Commitments And Contingencies [Line Items]
Operating lease remaining lease terms								6 years