Summary of Significant Accounting Policies - Schedule of Changes in Consolidate Balance Sheet and Cash Flow Statement for Adoption of New Acccounting Standards (Details) - USD ($)	6 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Mar. 31, 2018	Mar. 31, 2017	[1]
Inventories, net	$ 12,894,732		$ 8,536,934
Reserve for sales returns	1,466,627	$ 2,504,710	726,000	$ 600,000
Warranty provisions
Inventories	4,276,018	9,601,863
Reserve for sales returns	$ 740,627	1,904,711
Warranty provisions
Previously Reported [Member]
Inventories, net			8,057,774
Reserve for sales returns
Warranty provisions			246,840
Inventories		(8,403,620)
Reserve for sales returns
Warranty provisions		706,468
Restatement Adjustment [Member]
Inventories, net			479,160
Reserve for sales returns			726,000
Warranty provisions			$ (246,840)
Inventories		(1,198,243)
Reserve for sales returns		1,904,711
Warranty provisions		$ (706,468)

[1] The reserve for sales returns at the beginning of the period ended September 30, 2017 has beed adjusted to reflect the full retrospective adoption of ASC 606 effective April 1, 2018