Schedule II - Valuation And Qualifying Accounts (Details) - USD ($)	12 Months Ended
Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Allowance for doubtful accounts [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	$ 9,099	$ 5,482	$ 6,536
Net Additions (Reversals) Charged to Expense	(5,071)	6,970	1,341
Additions Charged to Other Accounts	0	0	0
Deductions	(81)	(3,353)	(2,395)
Balance at End of Period	3,947	9,099	5,482
Allowance for supplier accounts [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	28,865	34,673	46,078
Net Additions (Reversals) Charged to Expense	(857)	815	3,734
Additions Charged to Other Accounts	0	0	0
Deductions	(934)	(6,623)	(15,139)
Balance at End of Period	27,074	28,865	34,673
Allowance for recoverable taxes [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	18,752	23,218	29,504
Net Additions (Reversals) Charged to Expense	(3,392)	1,755	1,855
Additions Charged to Other Accounts	0	0	0
Deductions	(2,808)	(6,221)	(8,141)
Balance at End of Period	$ 12,552	$ 18,752	$ 23,218

Total of allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 4
-Subparagraph (SX 210.12-09)
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690

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Amount of increase in the allowances and reserves, which consist of the valuation and qualifying accounts that are either netted against the cost of an asset or that reflect a liability established to represent expected future costs, from charges to costs and expenses.

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Total of the deductions in a given period to allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs, representing receivables written off as uncollectible and portions of the reserves utilized, respectively.

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