Schedule II - Valuation And Qualifying Accounts (Details) - USD ($)	12 Months Ended
Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
Allowance for doubtful accounts [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	$ 3,947	$ 9,099	$ 5,482
Net Additions (Reversals) Charged to Expense	(2,006)	(5,071)	6,970
Additions Charged to Other Accounts	0	0	0
Deductions	(158)	(81)	(3,353)
Balance at End of Period	1,783	3,947	9,099
Allowance for supplier accounts [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	27,074	28,865	34,673
Net Additions (Reversals) Charged to Expense	3,730	(857)	815
Additions Charged to Other Accounts	0	0	0
Deductions	(9,084)	(934)	(6,623)
Balance at End of Period	21,720	27,074	28,865
Allowance for recoverable taxes [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	12,552	18,752	23,218
Net Additions (Reversals) Charged to Expense	1,732	(3,392)	1,755
Additions Charged to Other Accounts	0	0	0
Deductions	395	(2,808)	(6,221)
Balance at End of Period	$ 14,679	$ 12,552	$ 18,752

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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